Heart Transplant

[Cheyenne]

First post.......and I'll make it good. I have a '72 C10 Cheyenne that has been in the family since it was new. Grampa bought it, dad and I inherited it. The engine (402) has been rebuilt once, 1982 (I think)........ANYWAY..... I've got a nearly new 2007 LQ4/4l80e from an Express van, the PCM, harness etc. It has the fly by wire throttle body, but no pedal or TAC. I was going to junk the electronics and go with a cable operated throttle, but......What would I need to keep the electronics and could I add cruise control??? Checked with the local dealer. I can get the pedal assembly for $80. I didn't know I needed the TAC at the time. A mechanic at the dealership was good enough to give me the pin out for the PCM which helped alot. What I really need is the wiring diagram for the TAC/fly by wire system. Actually, any and all wiring diagrams for the Express would probably be helpful.....Thank in advance

[Cadha13]

I would buy a standalone computer to control the 4L80-E and a stand alone fuel injection system for the engine since I do have a 1972 Chevy in my back yard. ; ) Also I would Junk the whole factory intake and install a after market one with a cable accel. pedal. I think this would be easier and get wayyy better results than trying a shoehorned 2007 Van wiring system in the old 72 chassis. Look in the GM Performance parts catalog for your stand alone needs and parts. They have warranties. Have fun with your 72.

 

PS. Too bad that old 402 big block is a much better performance engine than that 6.0L. You can get 500 HP easy with a 402. Stick with the 4L80-E, built to handle power, but rebuild that 402 with fuel injection.