This is a dumb question but I honestly cannot find any information on this dispute a lot of searching, I just started overhauling a 1989 GTA 5.0 /5.7 tpi swap ws6 with a manual T5. While ordering parts for brakes I keep being asked if it's the "performance package" I assume it is being a ws6 GTA. Is that correct?

 

nope. They mean 1LE, but 9.9 times out of 10, you have S10 style regular old iron front calipers.

 

Awesome good to know, so the LE is non performance package? Man these cars have a lot of weird options.

one other thing, is there any difference between the 5.0 and 5.7 GTA other than the engine and the lack of choice for a manual on the 5.7? Just in terms of other mechanical items.

 

No. 1LE = with the performance package. 99.9% of thirdgens didn't have 1LE brakes. If your front calipers are rusty iron, they're not 1LE/Performance Package brakes. About the only GTAs that will ever have 1LE brakes are the 89 Turbo Trans Am.

Mostly, but it's best to just look up the parts on a case by case basis to be sure.