I've got an 88 ranger with the 2.9, and it's got the ford 7.5 rear and d28 front. I don't use it for offroading, just a daily driver and getting over the occasional snow drift. I found a 302 out of a 60s mustang that I would like to put into it, but I'm wondering if the differentials would handle the power, or if they would break. Did you guys that did v8 swaps change the axles, or just the engine and tranny?