My upgrade list includes; Complete L69 emblem package, Aerohead Racing 58 cc prepared 601's with 1.94 intake valves bowls blended & gasket matched, GM Offroad Cam 214/224 .444 .465 112 lsa, roller tipped rockers, GMPP ZZ4 intake ported & gasket matched, Cliffs Performance CC Quadrajet, Cometics gaskets throughout (expect pan 1 piece Fel-Pro), SLP Y-Pipe, "Free Flowing Cat"😉, 3" Cat Back, Summit 28 Spline Axles, 28 spline Yukon Limited Slip Diff, 4:11 gears. My performance goals......spin tire