Dyno run/ missing out maybe? Low hp/tq

Scamp - Grinding this in my head, I would think your first issue is heat, carb heat and fuel heat.

From the balance of the build, your parts and pieces seem balanced, so my thought is the builder had a focus. I had a 68 GTO I built, well balanced too. In the summer or even on long drives what I noticed is mid-power or on passing the thing would choke, stumble and fight. What I discovered is the fuel was boiling and having issues. Once I cooled the fuel (spacer, moving and wrapping line) I did not have this issue any more.

Again, my thoughts -