I would kill for that 60' foot.
I run 451, e heads, 13:1, dominator, solid cam, caltrac, foot brake, In my 65 belvedere , similar weight to yours,,,,,
10.04 is the bet et, 1.38 60', which I can't repeat, usually in the 1.41 to 1.44 range
Do the ladder bars make a big difference for you?
What torsion bar size up front?

Ps, nice car, congrats,,,,, I thought I saw that car for sale a few years back, the paint looks familiar,,,,,

Doug