PACA101: Cadillac 365/390 V8 to Chevy/GM/BOPC (ref.TH350/TH400) V8 Automatic Transmission Adapter Kit

Cadillac 365/390 to Chevy/GM & BOP (ref.TH350/TH400) V8 Automatic Transmission Adapter Kit

KIT OVERVIEW

Easily bolt your 1956-63 Cadillac 365/390 or 1955 Cadillac 331 to a Chevy, Buick, Oldsmobile, or Pontiac automatic transmission (TH350,TH400,700R4, & 200R4) with this adapter kit.

Please contact us if you have a Cadillac engine from 1949-53 as the bellhousing face is much different on the 331 series engines OR if you wish to use a 4L60/80E behind your 365/390. 

Key Features:

• 3/4-Inch Thick Billet Aluminum Adapter Plate – Strong, precise, and built to handle high torque.
• Retain your factory oil filter adapter - A relief is milled into the engine side of our adapter plate for clearance to the filter adapter. 
• No Cutting or Bellhousing Mods Required – Retains the full Chevy bellhousing for a true bolt-on installation.
• Starter Included –  Off the shelf and easily replaceable if the situation ever arises.
• All Hardware Included – High-grade bolts and fasteners for a complete, hassle-free install.

What’s Included:

• 3/4” Billet aluminum adapter plate
• Crank adapter
  
• 168 tooth Chevy flexplate
• GM High Torque Mini Starter 
• Complete hardware set + Instructions

Perfect for engine swaps, hot rods, or race builds where the classic Cadillac look meets modern Chevy drivetrain strength — all with zero fabrication.