So your saying that I should just run the higher compression and put in 92+ octane? My uncle says that it can run on 87 just fine, but I doubt that. I'm also trying to figure out a transmission and rear end setup. Right now it has a 4.11 and I think that is a little low. I was looking at maybe a 3.73. I still don't know if that is low enough or if I should just consider an overdrive transmission. It has a 350 right now, which is a pretty tough trans. I want it to be a very driveable car. To drive down the highway at 70 and the engine be running at a reasonable speed. I was looking at some 700R4's but I don't know if they are tough enough to withstand the engine. We are planning on getting 500hp out of it, so it needs to be tough.