So, I'm in the middle of literally doing a 3/4 drive train swap on my barracuda. the wheels are being replaced, the rear end (7.25) is being replaced with a 489 8.75, and the engine is being rebuilt. Literally the only thing staying the same is the transmission. So I"m sticking a 489 housing out of a 68 Charger in the rear end to replace the 7.25 and I have a few questions.
1. how far do I need to narrow it. new wheels are 17x8 with a 4.75 back spacing.
2. is the body being off 3/4 of an inch normal. like one side with 245/60 15s in back clears by that much and the other drags?
3. what do I need to set the new pinion angle at?
4. What is that castlated nut on one axle? Does that set the bearing preload or something?
5. Can I use sealed outer bearings on it?
I'm trying to get this all done asap so if someone could help me soon I would greatly appreciate it.