Rear end gear ratios

I've been trying to perfect my 72 swinger and I'm trying to lick out gear ratios. I have a 31i with a small cam, 486"/486" and I believe its cut on a 109 lsa. Milled 360 heads, cant remember how much they were milled. Hedman longtube headers, air gap intake, 750 bt demon and torqstorm supercharger.
Trans is a cope racing 904 full manual reverse vb with a hughes 3500 stall. I did the 8.8 swap years ago but didnt update the gearing.

Would my setup benefit from 3.73 ratio or 4.30 gear ratio? I have a brand new set of 4.30 ring and pinion to throw in it or I can buy a 3.73 setup. As of right now it has a 3.27 ratio and limited slip, 31 spline axles etc. Its mainly going to be driven around town maybe a few rips on the backroads and strips.