Here's my original setup when I did my truck. 5.3 with flat top pistons, 799 heads, ~10.2:1 compression, TBSS intake/90mm TB, BTR stage 4 V2 truck cam, Speed Engineering 1 3/4" headers into 2.5" pipe, X right at the front u-joint, Borla ProXS mufflers and out the rear corners. Had a cool/unique...