I bought a 71 chevelle about a year ago and discovered that it had 6 burnt rings, so i had a person rip it down to the block and rebuild it. After that I have added other things like a Edelbrock RPM air gap manifold, a crane cam with a slightly larger lift and a edelbrock 600cfm carb. After I got it on the road I noticed that smoke was coming out of the exaust, I just figured that it was the old oil burning off, so I let it go. I then moved out of state and it got worse, and I realized that the new piston rings didnt set right, and i cant have the guy fix it because i live 600 miles away. Now I have to tear it down again and rebuild it, and I want to make an awsome engine out of this. So I want to know the advantages of boring the engine, and I wanted to bore it 60 over. Is this too much and when I do this, what kind of pistons should I use, what would be a good lift on the cam, can I still use my intake that I have, and What is a realy good set of heads that will make this engine what it should be. Also how much horse power will this produce, I want a good bit, but I will want to be able to drive this car without it loping realy bad, and i want it to be kinda practile.