posi unit
 

does anyone know the web address for eaton gears, im trying to find a posi unit for a 69 bird 10 bolt 8.2 that i can just bolt in. i cant find it in the py catalog. thanks dave.

You can get them several places:

http://www.jdrace.com/
http://www.summitracing.com/
http://www.jegs.com/

Bought mine, along with gears and everything to install, from this place. Good prices and good support. I think I remember the axle bearings being a challenge...something about different versions, so hang onto your old ones for comparison if you are replacing them.

Being the first time I had done this, I also learned about left-hand threads on the ring gear the hard way..

http://www.tomsdifferentials.com/toma.htm

thanks ill check therse out