This is an area that I admit I'm not very well informed in. I'm going to throw a big-block into my Malibu, which currently has a running 350. The 350 has an HEI on it. Can/Should I reuse the HEI? It's in real good shape. Does that mean I don't have to change wiring harnesses? Would I have to change the harness if I use a points distributor that's on the big block right now? Or is there a way to adapt it to my current harness? I'm sorry if this is a real amateurish question, I have no idea when it comes to electrical. The car's a 70 Malibu.