So.... I measured the CCs in my heads. Measured piston to deck clearance etc, and punched all the numbers in to the compression ratio calculater. With a thicker head gasket (not mls) i will be at 10:1. The Carb is being tuned at Performance carb in Ontario by Ron Blanchard for my application. He says the vac sec will be fine. I will be at AVI next weekend running it. I really appreciate everyones thoughts and opinions. I'm gonna start at 32 degrees timing and go up from there.