I asked a question about mods for a 1980 Camaro 350 engine awhile ago to soup it up a bit and I got an answer from "chevyraceman_383" and it was really helpful. I got some Hedman long tube 1-5/8 headers. But I need the 2-1/4 exhaust piping and two mufflers. I don't what to do for that? Any tips? And another question I have is that, I was honing my cylinders and I noticed a Bad score on the cylinder wall. So will I have to bore it .30 or .60 over? What might be and estimate for machining out all 8 cylinders? Thanks.