The trans crossmember from any g body with a 200-4r will work for a TH-400. Trans mount location between a TH-400 and 200-R4 are really close to the same. Floor pan clearance in my car is tight. I have a 455/TH-400 in my 86 Grand Prix race car. The Grand Prix's also used 265 ci Pontiac motors. A friend's dad has a 81 with 4000 miles on it! It has a 265. I used Chevy solid moroso mounts for on the frame and made my own for the engine block. Made my own 1 7/8" D-port heads too!
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Todd Sedlmeier
Who ever thought pinewood derby cars would lead to this!
October 2004 HPP Shootout participate
http://www.highperformancepontiac.co...out/index.html
86 Grand Prix
535 High Port 8.93 @ 153
65 GTO
433 High Port 12.04 @ 113