Brad, didn't some combination of stuff we tried end up making like 625hp?

The CNC "standard" port Victors had quite a bit bigger port opening as I recall compared to a true std sized head.
These TF heads have port openings that look like a std valley pan gasket would seal up okay.

This particular set I have in the shop are going on a pump gas 505 with a solid cam and a 6bbl.