I am getting back into my wifes 69 Mustang and need some advise. I have a clean block that has been machined, bead blasted, and all the ports have been cleaned. I do have all the parts for the bottom end and the camshaft. It is a performer series cam. I am stuck on the top end. Can anyone help with the right combination of top end parts.

The engine is a 302 bored twice over. I was thinking of a 600 CFM carb with a mid-rise intake manfold. I also would like to get some raceing heads but again am not sure how to select them. What do all the numbers mean when it comes to valve size and all other measurements.

Any and all help is appreciated
Thanks,
Greg.