I have a 79 4x4 truck with a new engine and a tri-y header. the engine is otherwise stock, and is somthing of a turtle in it's current trim. I'm trying to weigh the options about performance, and have recently obtained a weber 32-36 which I will install shortly. I am looking at a few ideas including; porting and polishing my 20R head and sticking it on a bored out 22R short block, the LC engineering supercharger, or perhaps a 4.3L GM V-6 swap. I have known several people who have messed around with V-8 swaps, and I don't want to spend that much time trying to keep it from overheating. Any input from those of you with experiance is helpful.