How much horsepower

Dan, I built mine very similar except I have 12:1 KB hyper pistons and a solid flat tappet Comp with 244I, 252E and 540 lift. I used an air gap manifold and a Promax 750 carb with 1-5/8 headers. No dyno, haven't even broke it in yet but I was shooting for 450 HP. Maybe at the altitude I am at it will be more like 410, but my car is light so I am shooting for 12's. Total timing in mine is at 34 and I will start at 6 before and advance from there. Good luck with it!