BU1000702 1964-1966 Buick 401/425 Nailhead to Chevy automatic transmission w/small hole flex plate

by Buick
$850.00

Materials Included:

(1) Adapter Plate - Buick Nailhead to Chevy
(1) Crank Adapter-1964-66 Buick 401/425 Nailhead to Chevy Auto.
(1) Torque Converter Drive Plate
(1) Flexplate - Small Center
(1) 166W Tooth Ring Gear
(1) Balance Weight – Buick 401/425 to Chevy Auto.
(6) SHCS 7/16-20 x 3
(4) SHCS 7/16-14 x 1-3/4
(2) SHCS 7/16-14 x 1-1/4
(6) 7/16-20 x 3/4 Flexplate Bolts
(2) Dowel Pin .621 x 1
(3) 7/16 H Extra Thick Washer
(3) 7/16 Flat Washer


Are you planning on using a modern a GM 4L60E, 4L65E, and 4L70E (2008 and earlier only) or GM 4L80E and 4L85E transmission with this kit? By adding a US Shift Quick 4 stand-alone transmission controller you will save $100 dollars off of the cost of your Speed Gems adapter kit. 

We have additional options from US Shift. Please give us a call if you're not seeing what you need!


*Matching our adapter kits with your engine can be tricky. If you are unsure of which kit to purchase for your engine, please call customer service at (763) 767-4480. Speed Gems is not responsible for return shipping costs of mismatched kits.

Installation Instructions