What to do...

For 11.50’s and 118mph it does seem like the 60’ is lacking.
When I had the 383 in my heap running similar times it would 60’ about a tenth better than that 1.65.

I don’t recall your cam exactly.....high 250’s?....... I think at that elevation with a cam that size, foot braking....... 5000-5200 or so stall, min.
Imo, it needs an 8” unit.

The speed is pretty good...... just gotta work on the front half.

Have you done a timing loop and determined 32* is really the sweet spot?