I'm not planning on hogging out the ports, its basically focusing on the short side of the ports, he said i could gain up to 30cfm by doing this. This is not going to include a gasket match on the heads, which he said i'm not really going to gain a whole lot from that anyway. Plus I plan on milling the heads and decking the block to get it as high as i can. I can also use a thin head gasket too. Surely with decking, milling, and thin head gaskets i can get around 9:1, right? Will this be enough compression to have a .550 lift cam? Thats not really that big for a big block right? I had a .480 lift cam in my 350 and it was very streetable, in fact i wish i had gone bigger. I ended up hurting that cam anyway so it doesn't matter.