02 H. O. 6spd, Dana 80 Rear Diff: Just installed a PML Diff cover. Nice product, well made and looks great. Added 5 qts amsoil 75-140 and still didn't make the full mark. Quit an increase in volume over stock. There is a suprise in store when you finish the job. If you look at the clearance from the spare tire to the rear of the diff cover when the rear suspension is loaded down,, there is no room to clear the tire. So now when I hook up the 40 ft toy hauler, I'll be taking the spare and carrying it in the bed , not the end of the world, but annoying none the less.