Hi guys I am planning my engine build and I would like some opinions on the compression ratio I should run. I have a 62 truck block casting 068 going into a 63 Impala 2 door hardtop. Iam going to run the car 90% street and 10% strip or something like that. You know how the racing bug creeps in. The car has a M21 and a 12 bolt posi with 456 gears which I will likely have to change to 3.73. I plan on Edelbrock heads, a solid roller cam, maybe around .6 lift and I have a 881 manifold with (2) 500cfm AFBs. The engine will be bored .030.The question is how much compression can I run on pump gas with out additives. I was thinking based on a drop of 1 point to be around 10:1( from previous discussions that I can't find). But maybe I can squeak out 10.5:1. I was thinking about the Ross pistons 11:1or 11.5:1 and Eagle I beam rods. If any of you guys with more experience on this subject can help me out it would be appreciated. Can anyone estimate what horsepower this set would make. I am not after the ultimate drag car but I would like to get below 12 seconds.