Axle
B/W,
Dont BOTHER with the 12-Bolt,your NOT Gaining Much over the 8.5.Put the 9" in and BE DONE!Listen to Me,this is not the 1st Rodeo for me?I just seen a Complete 9" center w/Spool on the Classifieds for 225.00.The Gear for the 12 bolt will be More than that!
Not saying you Cant Break a 9",but when you add that rear Pinion bearing it SURE makes a LARGE Difference!
Later
G 8)