[GMC91]

Right now Im working on a 305 swap to take the 4.3 out. Ordered a comp cam int and exh lift are .490 int duration is 218 and exh duration is 224(trying to think from memory might be a little off). Found out the motor has roller lifters so thats what I went back with. Ordered the cam, lifters, and a gear drive from summit today. I also took the heads and dropped them off at the machine shop close to where I live to have the exhaust ports ported and polished, valves reseated, new valve seals, and bigger springs to handle the .490 lift. I got a friend that went to NADC but dropped out after one semester, lucky for me the semester he took was electronics and tunning. He will hopefully be able to re-tune my computer and chip to work with the v8 and cam. At least he says he can, if not overnight parts from summit work nice too just cost more. Hoping to have the motor in the truck by this weekend. Everything Ive read so far has said the computer is the same for a 4.3 as it is for a small block. The chip is what is different.

http://www.summitracing.com/parts/CCA-08-422-8......the cam
http://www.summitracing.com/parts/ED...4..........the lifters
http://www.summitracing.com/parts/PRO-66917C........The gear drive