Fordboy, you're right on at least some of your summations.
We did find that the flow increased by 'lengthening' the short side radius. Different valves helped, but ONLY after addressing the short side radius. The stock heads, and modified stock heads, flowed better than the race heads.
There will be a lot of work done in this area next winter, when we switch to turbos!
John K has been working feverishly on the front aero mods. Randy and John set and checked the alignment last weekend.
John is getting closer on the fiberglass work. He says the is still a slight difference side to side, but he's gaining on it!
Nice work, too! Way to go, John!