Ok, Im about to start on converting the gf's 89 c2500 to 6.0/4l85e. I have a donor truck in the form of an 04 2500hd. While Im at it I plan to swap in the rear axle from the 04 to gain the 4.10 gears and the disc brakes.
My question is, can I make the gmt800's hydroboost & brake pedal fit the 89s firewall & underdash area? Will it all work or would I be better off using the 800's setup as a core and buying a hydroboost for the 89 and getting an 89 pedal? One way is pretty much free the other would be a couple hundred bucks, so needless to say I would rather use the 800's stuff (plus its probably been improved since the 400's was designed).
Thanks guys.


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