I also use an 8.75 rear with the MP aluminum center section, better than any of the cast iron ones. I also use a pro gear which is only available in one ratio that I've found, 4.88.
It holds up with a foot brake or transbrake but a 4 speed would do it in. If I had it to do all over I would have built a Dana 60 though. Much cheaper in the long run.
Same here. I used the aluminum center, with back braced housing in my red car with a trans-brake and it's been as quick as 1.38 in the 60 ft. But like you, I would go Dana 60 in a hearbeat now, and not even consider the 8 3/4 for the cost.
Joe, also, for what it's worth, we swapped the pink b'cuda from a 8 3/4 to D60 a few years back, and it didn't change the ET.
On Larry's deal (challenger), we just ended up building another 8.75" with richmond gears, and a new 727 trans. The teeth on the ring gear will strip again in about 4-5 years, but I couldn't for the life of me talk that fellow into a D60, lol.
