I read a thread a little ways down the page and some people say that the l92 are fine for mild boost. I have a set of l92s that are going to have to be milled at least .020 to clean them up from previous damage. after milling the heads will they no longer be any good for boost. There are a few good sets of heads in the for sale section I was looking at if I couldn't use these. There for a aluminum forged 370. Il be running a victor Jr intake most likely with a carb. Its all for a 92 rcsb. I want some kind of turbo set up but havn't figured out the size yet.