This is my step-dad's gmc jimmy that has a 383 stroker with a factory 4 speed 205 combo, it also has dual electric fans. We have installed full 1 ton running gear (60 front, 14 bolt rear with 4.10 gears). It has rear disc brakes, 14 inches of lift, 39.5 boggers in back and 39.5 swampers in front. The mufflers are my personal favorite because they are the delta force race mufflers with out tail pipes and are hella loud!! This thing is a beast in the mud.