Just purchased a rear differential and axle from a 2001 camaro ss to put on my 91 firebird. The axle is longer than the stock by a few inches. Have a few questions...
It was just the axles and differential- no brakes. Pretty sure they came with disc brakes. Can i use my stock drum brakes? Will they bolt onto the 2001 axle?
Also, are there brake line extensions or do i have to just get brake lines from a 98-02 and just swap them out?

 

Probably not going to be able to just bolt on your stock drums. Without looking, drum housings usually have a different flange than rear disc axles. That said the LS style 4th gen rears used a integrated disc with drum e-brake setup, so maybe? but probably not. Would be better to get the rear brakes off a 98-up Camaro/Firebird.