I'm about to swap a 8.8" rear into a fox body Ford that came factory with a 7.5"(with a 302 and automatic transmission-C-4 in my case. I was under the understanding that both the 7.5" and 8.8" rear use the same driveshaft. I just recently read that the 8.8" rear uses a driveshaft that is 1" shorter than the 7.5". Summit racing has an aluminum driveshaft for the fox Fords. They show it to be 54.5" long and they claim it will fit both the 7.5" and 8.8". Does anyone have any first hand experience with this or know if this is true?