My friend has some 4.10's that he's selling. It is for a 7.5 rear end but they are coming out of a truck. Would they work in my car since it's the same rear end, or did ford do something stupid and make different 4.10's?

 

Man, don't get them. You'd be stupid if you bought used 4.10 gears that are coming out of a truck. I personally wouldn't buy used gears from anything. Save up and buy brand new 4.10's.