Early A-Body Spitfire Headers

When I spoke with Harold, the changes he mentioned were simply to make some of the tubing a little larger for better flow. Specifically, I was told that he increased the size of the collecter tubing (where 2 tubes come together into one tube - that tube is now larger).

Does that make sense?

I have not installed them on my 64 yet. I am running an auto.

Thanks,
Clint S
San Gabriel