Speed Gems

312-350 FORD Y-BLOCK TO CHEVY V8 AUTO
$700.00 USD

312-350 FORD Y-BLOCK TO CHEVY V8 AUTO

Speed Gems

Materials Included(1) ADAPTER PLATE(1) CRANK SPACER(1) FLEXPLATEHARDWARE   *Matching our adapter kits with your engine can be tricky, please email ...

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$700.00 USD
317-350 1952-57 LINCOLN/MERCURY OHV V8 TO CHEVY V8 AUTO
$700.00 USD

317-350 1952-57 LINCOLN/MERCURY OHV V8 TO CHEVY V8 AUTO

Speed Gems

Materials Included(1) ADAPTER PLATE(1) CRANK SPACER(1) FLEXPLATEHARDWARE *Matching our adapter kits with your engine can be tricky, please email yo...

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$700.00 USD
318-350 LA SMALL BLOCK MOPAR TO CHEVY V8 AUTO
$700.00 USD

318-350 LA SMALL BLOCK MOPAR TO CHEVY V8 AUTO

Speed Gems

Materials Included(1) ADAPTER PLATE(1) CRANK SPACER(1) FLEXPLATEHARDWARE   *Matching our adapter kits with your engine can be tricky. If you are un...

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$700.00 USD
390-350 FORD FE TO CHEVY V8 AUTO
$700.00 USD

390-350 FORD FE TO CHEVY V8 AUTO

Speed Gems

Materials Included(1) ADAPTER PLATE(1) CRANK SPACER(1) FLEXPLATEHARDWARE *Matching our adapter kits with your engine can be tricky, please email yo...

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$700.00 USD
460-350 FORD BIG BLOCK 429/460 TO CHEVY V8 AUTO
$700.00 USD

460-350 FORD BIG BLOCK 429/460 TO CHEVY V8 AUTO

Speed Gems

Materials Included(1) ADAPTER PLATE(1) CRANK SPACER(1) FLEXPLATEHARDWARE *Matching our adapter kits with your engine can be tricky, please email yo...

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$700.00 USD
5.7-350 5.7L HEMI TO CHEVY V8 AUTO
$700.00 USD

5.7-350 5.7L HEMI TO CHEVY V8 AUTO

Speed Gems

Materials Included(1) ADAPTER PLATE(1) CRANK SPACER(1) FLEXPLATEHARDWARE *Matching our adapter kits with your engine can be tricky, please email yo...

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$700.00 USD
8BA-350 FORD FLATHEAD 8BA TO CHEVY V8 AUTO
$700.00 USD

8BA-350 FORD FLATHEAD 8BA TO CHEVY V8 AUTO

Speed Gems

Materials Included(1) ADAPTER PLATE(1) CRANK SPACER(1) FLEXPLATEHARDWARE *Matching our adapter kits with your engine can be tricky, please email yo...

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$700.00 USD
AMC Rambler 6-Cylinder to Chevy Automatic V8 Transmission (Kit #AMC101)
from $1,100.00 USD

AMC Rambler 6-Cylinder to Chevy Automatic V8 Transmission (Kit #AMC101)

Speed Gems

*CALL TO ORDER* Speed Gems806H S. Division St., Waunakee, WI 53597PHONE: (763) 767-4480EMAIL:  sales@transmissionadapters.com

from $1,100.00 USD
bellhousings
$395.00 USD

BH10002 1957-1963 Buick Nailhead to GM 4-and 5-Speed Bellhousing

Speed Gems

This is a BRAND NEW cast-aluminum Bellhousing that will allow you to bolt a 3, 4, or 5-speed Manual Transmission to the 1957 thru 1966 Buick Nailhe...

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$395.00 USD
BH10003  Oldsmobile & Cadillac Bellhousing
$395.00 USD

BH10003 Oldsmobile & Cadillac Bellhousing

Speed Gems

This is a BRAND NEW cast-aluminum Bellhousing that fits Oldsmobile (1949 thru 1964) or Cadillac extended bellhousing engines (1949 thru 1954).  T...

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$395.00 USD
BPOC101 - BOP V8 BELL/BLOCK PATTERN TO CHEVY V8 AUTOMATIC TRANSMISSION
from $350.00 USD

BPOC101 - BOP V8 BELL/BLOCK PATTERN TO CHEVY V8 AUTOMATIC TRANSMISSION

Speed Gems

Materials Included: (1) Adapter Plate (1) Pilot Bushing(4) HCS 3/8-24 x 1-1/4(2) HCS 3/8-16 x 1-1/2(4) FHSCS 3/8-16 x 1(6) FLAT WASHER 3/8(6) LOCK ...

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from $350.00 USD
BU1001  Buick 364 Nailhead Heavy Duty Cast-Aluminum Stick Kit
from $1,450.00 USD

BU1001 Buick 364 Nailhead Heavy Duty Cast-Aluminum Stick Kit

Speed Gems

*Please indicate what year your engine is in the comments when ordering.1957-63 has a 2.00" Crank I/D1964-66 has a 1.70" Crank I/D*Please indicate ...

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from $1,450.00 USD
BU1002  Buick 401 & 425 Nailhead Heavy Duty Cast-Aluminum Stick Kit
from $1,450.00 USD

BU1002 Buick 401 & 425 Nailhead Heavy Duty Cast-Aluminum Stick Kit

Speed Gems

*Please indicate what year your engine is in the comments when ordering.1957-63 has a 2.00" Crank I/D1964-66 has a 1.70" Crank I/D*Please indicate ...

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from $1,450.00 USD
BU101  Buick Straight-8  233/248/263 w/ orig. Manual Transmission to Chevy V8 Automatic
from $1,250.00 USD

BU101 Buick Straight-8 233/248/263 w/ orig. Manual Transmission to Chevy V8 Automatic

Speed Gems

Note: THE TORQUE TUBE WILL NEED TO BE CONVERTED TO A MODERN DRIVESHAFT TO BE ABLE TO ADAPT TO A NEWER TRANSMISSION TAILSHAFT FLANGE OR TRANSFER CAS...

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from $1,250.00 USD
BU201  Buick Straight-8  248/263 w/ orig. Dynaflow to Chevy V8 Automatic Transmission
from $1,250.00 USD

BU201 Buick Straight-8 248/263 w/ orig. Dynaflow to Chevy V8 Automatic Transmission

Speed Gems

Note: THE TORQUE TUBE WILL NEED TO BE CONVERTED TO A MODERN DRIVESHAFT TO BE ABLE TO ADAPT TO A NEWER TRANSMISSION TAILSHAFT FLANGE OR TRANSFER CAS...

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from $1,250.00 USD
BU301  Buick Straight-8  320 w/ orig. Manual Transmission to Chevy V8 Automatic
from $1,250.00 USD

BU301 Buick Straight-8 320 w/ orig. Manual Transmission to Chevy V8 Automatic

Speed Gems

Note: THE TORQUE TUBE WILL NEED TO BE CONVERTED TO A MODERN DRIVESHAFT TO BE ABLE TO ADAPT TO A NEWER TRANSMISSION TAILSHAFT FLANGE OR TRANSFER CAS...

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from $1,250.00 USD
BU401  Buick Straight-8  320 w/ orig. Dynaflow (w/ 3.625" crank flange) to Chevy V8 Automatic
from $1,250.00 USD

BU401 Buick Straight-8 320 w/ orig. Dynaflow (w/ 3.625" crank flange) to Chevy V8 Automatic

Speed Gems

Note: THE TORQUE TUBE WILL NEED TO BE CONVERTED TO A MODERN DRIVESHAFT TO BE ABLE TO ADAPT TO A NEWER TRANSMISSION TAILSHAFT FLANGE OR TRANSFER CAS...

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from $1,250.00 USD
Buick 264/322 Nailhead
from $1,150.00 USD

BU501 1953-1956 Buick 264/322 Nailhead to Chevy Automatic V8 Transmission

Speed Gems

Materials Included: (1) Adapter Plate - Buick Nailhead to Chevy(1) Crank Adapter 1953-56 Buick 264/322 Nailhead to Chevy Auto.(1) Torque Converter ...

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from $1,150.00 USD
BU601 1957-1963 Buick 364 Nailhead (w/ 2.90” crank flange) to Chevy Automatic Transmission
from $1,150.00 USD

BU601 1957-1963 Buick 364 Nailhead (w/ 2.90” crank flange) to Chevy Automatic Transmission

Speed Gems

Materials Included: (1) Adapter Plate - Buick Nailhead to Chevy(1) Crank Adapter-Inner(1) Crank Adapter-Outer(1) Torque Converter Drive Plate(1) Fl...

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from $1,150.00 USD
BU602 1957-1963 Buick 401/425 Nailhead (w/ 2.90" crank flange) to Chevy Automatic Transmission
from $1,150.00 USD

BU602 1957-1963 Buick 401/425 Nailhead (w/ 2.90" crank flange) to Chevy Automatic Transmission

Speed Gems

Materials Included: (1) Adapter Plate - Buick Nailhead to Chevy(1) Crank Adapter-Inner(1) Crank Adapter-Outer(1) Torque Converter Drive Plate(1) Fl...

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from $1,150.00 USD
BU701 1964-1966 Buick 401/425 Nailhead to Chevy Automatic V8 Transmission W/ Large Hole Flexplate
from $925.00 USD

BU701 1964-1966 Buick 401/425 Nailhead to Chevy Automatic V8 Transmission W/ Large Hole Flexplate

Speed Gems

Materials Included: (1) Adapter Plate - Buick Nailhead to Chevy(1) Crank Adapter-1964-66 Buick 401/425 Nailhead to Chevy Auto.(1) Torque Converter ...

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from $925.00 USD
BU702 1964-1966 Buick 401/425 Nailhead to Chevy Automatic V8 Transmission (w/ small-hole Flexplate)
from $1,075.00 USD

BU702 1964-1966 Buick 401/425 Nailhead to Chevy Automatic V8 Transmission (w/ small-hole Flexplate)

Speed Gems

Materials Included: (1) Adapter Plate - Buick Nailhead to Chevy(1) Crank Adapter-1964-66 Buick 401/425 Nailhead to Chevy Auto.(1) Torque Converter ...

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from $1,075.00 USD
BU801  Buick Flexplate and Adapter for 1963 & Older Buick 364 to 1964 & Newer Automatic Transmission
from $179.00 USD

BU801 Buick Flexplate and Adapter for 1963 & Older Buick 364 to 1964 & Newer Automatic Transmission

Speed Gems

Materials Included: (1) Buick Tapered Pilot Bushing (PB10009)(1) Flexplate (FP10003)(1) 166W-tooth Ring-gear (RG10004)(1) Balance Weight for Buick ...

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from $179.00 USD
BU802  Buick Flexplate and Adapter for 1963 & Older Buick 401/425 to 1964 & Newer Automatic Transmission
from $179.00 USD

BU802 Buick Flexplate and Adapter for 1963 & Older Buick 401/425 to 1964 & Newer Automatic Transmission

Speed Gems

Materials Included: (1) Buick Tapered Pilot Bushing (PB10009)(1) Flexplate (FP10003)(1) 166W-tooth Ring-gear (RG10004)(1) Balance Weight for Buick ...

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from $179.00 USD
CA101 1954-63 CADILLAC 365/390
from $1,250.00 USD

CA101 1954-63 CADILLAC 365/390 OR “FLAT-BACK” BLOCK STYLE 331 TO CHEVY AUTOMATIC V8 TRANSMISSION

Speed Gems

Materials Included:  (1) Adapter Plate - 1954 & up Cadillac to Chevy Automatic(1) Crank Adapter(1) High Torque mini-Starter(2) HCS 3/8-16 x 3-3...

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from $1,250.00 USD
CA102 1954-63 CADILLAC 365/390 OR “FLAT-BACK” BLOCK STYLE 331 TO CHEVY MANUAL TRANSMISSION
$1,650.00 USD

CA102 1954-63 CADILLAC 365/390 OR “FLAT-BACK” BLOCK STYLE 331 TO CHEVY MANUAL TRANSMISSION

Speed Gems

*This kit includes everything you will need to mate your 365 or 390 to a manual transmission. There is no need to buy additional parts when you ord...

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$1,650.00 USD
CA201 1942-1948 Cadillac 346 Flathead w/Hydra-matic to Chevy Automatic V8 Transmission
Sold out
from $1,350.00 USD

CA201 1942-1948 Cadillac 346 Flathead w/Hydra-matic to Chevy Automatic V8 Transmission

Speed Gems

*This kit will only fit the 346-Cadillac Engine that originally had a Hydra-matic Transmission.   Materials Included: (1) Adapter Plate-Inner - Cad...

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from $1,350.00 USD
Sold out
OL301 1949-1956 Oldsmobile 303/324
from $1,650.00 USD

CA401 1949-54 CADILLAC 331 W/ “EXTENDED BELLHOUSING” BLOCK STYLE TO CHEVY AUTOMATIC V8 TRANSMISSION

Speed Gems

Materials Included: (1) Adapter Plate - Olds/Cadillac 1949-1964 to Chevy(1) Crank Adapter - Olds/Cadillac 1949-1964 to Chevy(1) Torque Converter Dr...

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from $1,650.00 USD
CA501 1949-54 CADILLAC 331 W/ “EXTENDED BELLHOUSING” BLOCK STYLE TO CHEVY MANUAL TRANSMISSION
from $1,650.00 USD

CA501 1949-54 CADILLAC 331 W/ “EXTENDED BELLHOUSING” BLOCK STYLE TO CHEVY MANUAL TRANSMISSION

Speed Gems

Materials Included: (1) Bell Housing - 1949 Old/Cad to Chevy Manual(1) Flywheel(1) Starter(1) Starter Block - Multiple Olds/Cadillac applications(1...

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from $1,650.00 USD
CA601 CADILLAC 429 W/ ENGINE BLOCK MOUNTED STARTER TO CHEVY V8 AUTOMATIC TRANSMISSION
from $750.00 USD

CA601 CADILLAC 429 W/ ENGINE BLOCK MOUNTED STARTER TO CHEVY V8 AUTOMATIC TRANSMISSION

Speed Gems

Materials Included: ***IF YOU HAVE A 1964 ENGINE W/ A BELLHOUSING MOUNTED STARTER, EMAIL US FOR DETAILS BEFORE PURCHASING OR CONTINUING*** (1) Adap...

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from $750.00 USD
CA701 64 Cadillac 429 (TH400 Style) to Hydramatic (59-64) 4 speed Transmission
$90.00 USD

CA701 64 Cadillac 429 (TH400 Style) to Hydramatic (59-64) 4 speed Transmission

Speed Gems

Materials Included (1) FS10002 1964 CAD Crank Spacer to Hydro (2) DP10001 0.620x1.00 Dowel Pin This kit is designed to adapt your 1964 Cadillac 429...

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$90.00 USD
CH301 CHEVY STOVEBOLT STRAIGHT-6 (216/235/261) TO CHEVY V8 AUTOMATIC TRANSMISSION (700R4)
from $1,150.00 USD

CH301 CHEVY STOVEBOLT STRAIGHT-6 (216/235/261) TO CHEVY V8 AUTOMATIC TRANSMISSION (700R4)

Speed Gems

Call us for order details +1(763) 767-4480 Materials Included:  (1) ADAPTER PLATE, CHEVY IN-6 TO CHEVY V8 Automatic Transmission(2) SHCS, ¼-28 X 1...

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from $1,150.00 USD
CH401 DODGE HEMI W/ NAG1 TO CHEVY LS1 AUTOMATIC TRANSMISSION
$1,500.00 USD

CH401 DODGE HEMI W/ NAG1 TO CHEVY LS1 AUTOMATIC TRANSMISSION

Speed Gems

Materials Included: (1) Adapter plate - Dodge to Chevy(1) Flexplate Adapter(1) Top steel bar Assembly(2) FHSCS 3/8-16 x 1-1/2(4) FHSCS 5/16-18 x 1(...

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$1,500.00 USD
CH501 STARTER PLATE KIT FOR 1955-56 CHEVY V8 TO LATE MODEL TRANSMISSION
$225.00 USD

CH501 STARTER PLATE KIT FOR 1955-56 CHEVY V8 TO LATE MODEL TRANSMISSION

Speed Gems

Materials Included:  (1) Adapter Plate  (1) Hardware Kit Please Note: WILL ALSO WORK IN LATE MODEL APPLICATIONS WHERE THE STARTER MOUNTING THREADS...

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$225.00 USD
DO101  Dodge Hemi w/ NAG1 to Chevy Automatic V8 Transmission
from $1,375.00 USD

DO101 Dodge Hemi w/ NAG1 to Chevy Automatic V8 Transmission

Speed Gems

*This Kit allows for using the original factory starter in the stock location, while retaining the factory flexplate, and doesn't require any bloc...

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from $1,375.00 USD
DO102  Dodge Hemi 45RFE to Chevy Automatic V8 Transmission
from $1,375.00 USD

DO102 Dodge Hemi 45RFE to Chevy Automatic V8 Transmission

Speed Gems

*This Kit allows for using the original factory starter in the stock location, while retaining the factory flexplate, and doesn't require any bloc...

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from $1,375.00 USD