Getting ready to do some drivetrain upgrades and wondering how much I would benefit or hate changing from 3.73 to 4.30s. Car is SN95 with HCI carbed 302. I am ditching the T5 for a TKO 600 with 0.64 OD and about to upgrade the rear end to 31 spline axles/ trac lok. Car is a weekend warrior and hope to run a few UMTR races this summer. Would it be worth swapping the current 3.73 to 4.30?