3.73's definately.. get that break in period out of the way, refill the rear diff with some new fluid, then put in the intake mods and let her rip.SLVR04GT said:TB and Plenum OR 3.73 FFRP? Both are going on eventually, but which first?How hard is the Accufab TB and C&L Plenum to put on? What kind of REAL gains am I looking at, I've seen numbers from 5hp to 20hp?