rear end cost for a 360

[sspeeddemon]

I just found a 360 engine and transmission for a few hundred bucks. i know i probably can't buy it but how much would a rear end cost for me to transfer to a bigger engine like a 350 Vortec or a 360 for instance? Also anyone know who I can buy a nitrous system for my truck from without soending 600 dollars? I am thinking of getting the small one that is only 5 oz. or something. it is not alot of nos but i don't need alot for a 4 cyl.





thanks.