I think you may be a bit over geared, but I think I'd be looking to others with similar combos to be sure. My hunch is that car would be fine with a 3.73.
Typically, "unnaturally" aspirated
V-8s don't like a real steep starting line ratio (SLR) and currently you run 13.48:1 (3.38*4.11). That's a serious 1st gear. I generally stay under 12:1 if I can for most combos and like I said, a blower motor often wants less
I work on a car that is also overgeared (but nat aspirated) and we have had some luck with short shifting 1st gear significantly and coming out relatively gentle. Without spending any money, I'd likely start raising your launch to where it spins on a prepped track, and then back off a couple of hundred RPM.
If you can get a repeatable launch, then start shifting 1st early. I'd say if you are shifting at 5800 now, shift 1-2 at 5000 and see what happens on the time slip. Then go up or down from there, if it's quicker, try lower, slower, try higher, but you have to get the launch stable first. One variable at a time
Then I'd likely shift at 5800-6000 for the remaining gears. I normally say 400 rpm over the peak as a starting point, but with your flat curve and so much torque, I think stopping at 5800-ish is a good start until you get launch and 1-2 down, also setting a shift light at 5800 will likely get you 6000. Then after you get it repeatable, play around from there.
With a big torque car though and a lot of gear, you'd be amazed how coming out a little more gentle and shifting early can help, 2nd gear really ends up traveling down the track if you have an engine with a lot of torque. Seems counter-intuitive, but 1st gets so short it actually slows you down to let it rev