i did tha exact same swap on my 94 s10 on the trailer, at first all i did was throw a v8 in it without doing any wiring. hook athe sensors in the same respective spot on the 350, all your gauges will work. all the front accesories will bolt on including the water pump. trany is also a direct bolt on. only serious thing you have to replace is the exaust and motor mounts. now the wiring, the easiest thing to do is run a throttle body like it came with from the factory. get an intake, tb and computer for a 350 and it will work. only thing you have to do is extend the factory engine harness. if you wanna run a carbed motor, i agree with the first guy, because thats what i did, i went through every wire one by one till i was left with only what was needed. get a good fuel regulator that can be adjusted down to around 6-7 psi, i believe the factory fuel pump's press is low enough to regulate down. get a factory v8 radiator. after that you should be good. prepair youself for a lot of wire removal if you want to go back to the 60's technology, i spent 2 weeks working on mine, but its worth it. have fun