Hey guys, I'm new to any sort of forum so forgive me if I am posting in the wrong place. I have a 1989 Chevy C2500 with a 5 speed manual. This winter I would like to do one of two things, either rebuild and cam my 350 TBI, or swap in a 400 small block. So my questions are, if I cam a 350 TBI, will I need to do anything to my trucks computer? And if I drop in a 400 small block, what would I need to do with my computer? Also, what else would I have to do if I dropped a carbureted engine into a truck that is powered by a TBI engine? As you can see I'm not very experienced in dealing with vehicle computers. I am only a novice mechanic who is thirsty for knowledge! Any input with either option would be greatly appreciated! Thank you!