Stock 1979 360 with Speedmaster head question

It matters more when you're bumping 8 than 10. Lol
Yea that's true. With the 8553 I should be at 9.6 with the 1008 It would put me at 10.1 im not aiming for a particular number so the difference to me is the price of the gasket! Lol I will re cc the heads and all that before I put it together to get a better number but I'm happy with 9 point anything lol