Good start.

It's a bit of a PIA considering where you are now, but might be worth it if you take the long view, the front crossmember can be moved forward 1" easily, and 2 with some front rail contour massaging. The looks of a hiboy support a longer wheelbase well, especially with a big appearing engine. It would entail moving the hairpin rear mounts and the steering box mount as well. Odds are (can't see/measure what your current setup allows) you could move the engine back as suggested, probably about 1". If you made clearance "bulges" for just the right cylinder head and distributor you wouldn't lose much leg room either.

Seems like a lot of work for a short gain, but nothing will ruin the enjoyment of you car faster than being afraid to drive it because it "misbehaves" in slow driving, or overheats on the highway because the front mounted fan causes just enough blockage of the air flow to push it over the edge. (plus they look ugly in a Deuce grille/shell)