I have a 87 GTA w/ Brog warner Axle and a 91 Firebird 3.8 both automatic. Im planning an Ls1 Swap engine/tranny and Axle. Is the LS1 Axle better than the Brog Warner axle my GTA has (better= Stronger, better gears etc...). And Will the Ls1 Axle bolt right on any of my 2 birds or are there modifications tom do???

 

The BW piece is better. The LS1 diff is the same as a third gen ten bolt 7.5" c-clip junko

 

Here's some info on the 10-bolt, third- and fourthgen, that you might find interesting:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC