A friend of mine is gathering parts to swap a 12 valve into his '05 F250 4x4. It currently has the 5.4 and auto, with 4.88 gears, and 37" tires. He isn't sure what to do about the tranny. If he could make the auto hold up, he would like to keep it. I know he has found an adapter and a stand alone control module for the auto, and will need a different torque converter. What else does he need or what are the alternatives? His goal is to be pushing 500hp, basically a tow / play rig. Might occasionally do a truck pull. He doesn't want to dump a load into the auto if it is just going to crap out on him.

 

I have a 99 Super Duty F250 Ext. Cab Long Bed 4X4 that I'm rebuilding a 6bt to repower that triton V10 and ZF 5spd. I picked it up for Cheap so good luck with your and this spring I'll start my conversion Thread!

Take your time and keep us in the loop!