Gears & Axles - ms4 cam "thinking of switching gear"

Im about to rebuild my rear and Im thinking of switching my gears from a 373 to a 430, my mods are in my sig. I was wondering if Id pick up any et.

What size tire are you running?

Id say gains would be minimal or non existant being that it is an automatic with a big stall.. at least from what I've seen.

28-9 mickey

Ideally you want your gearing set so that you are hitting just past peak power as you are crossing the finish line in your 1:1 gear, in this case 3rd. So, if your engine made peak power at say 6200, and holds for a couple hundred RPM before it drops, set your gearing so that you will be hitting the line at 6600 or so.