Stock weight distribution for various body styles - can you improve balance w/out drastic mods?

On track-day,The best I could do on my streeter68 FB-Cuda SBM/A833/GVOD/8.75 was 1760/1512 f/r, total 3272; me not in it. That's 53.8% front bias, in track trim.
That was;
aluminum topend, wheels,and trans box. Battery in trunk.1/4 tank gas.
Removed; back seat(64),3"full-length dual-Exhaust(72),sway bar and skid plate(18),Heater(16),front bumper(30); the rear seat never went back in.
I left in; the P/S,P/B, and heavy 7-blade all-steel fan with it's T-clutch.
To hit 50/50 I would need to move 124 to the rear, or remove 248 from the front, or some combo. I know the P/S is heavy, but I'm keeping it.
Normal street weight with 1/2 tank of gas is 3550,(no rear seat), me not in it. And the bias changes to 52.5 front in street trim .
I used a balance-beam truck scale for before and after, so not sure about the accuracy; but the bias won't change much.