Probably the best modification I have made to my 65 GTO was to put a 200/4R trans in it. 400 with 3.73 gears (13.20’s @ 106 in quarter). I got the trans for free from a friend but junkyards have a lot of these transmissions. The newer the trans. the better.
http://www.bulkparts.com/ is where I picked up the rebuild kit converter. I think I had $450 in the rebuild kit, converter, and shift kit from Summit. Rebuilt it myself. Second gear is a little soft under full throttle but I just need to install a larger servo for like $120. I would recommend getting one of these from a junkyard and taking it to a local shop if you don’t want to do it yourself (Hays makes a book on rebuilding transmissions). Bolts in TH400 x-member location, TH350 yolk, and the same driveshaft. The larger the boost valve in the pump the better. My shift kit came with a .500” unit. I can’t think of the brand off the top of my head but it came from Summit and was like $110. Speedometer gears were like 40-60 bucks! I used the same from a Monte SS.
Hays Manual
13 vane pump kit
Hardened stator shaft support
Second gear servo
Shift kit
Rebuild kit
Fluid and filter
New trans mount
350 yolk (junkyard or someone always has one)
TV cable
TV cable bracket
OK I’ll stop rambling not.
Who ever thought pinewood derby cars would lead to this!
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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