I have a 1998 firebird that i want to swap the rearend into my 1985 TA. My question is:
1. I have read on here that the 4th gen wheels will then bolt up to the 4th gen rear in my 3rd gen with no problem, is there a parts i can replace on the front end to make the 4th gen wheels fit on the 3rd gen car? or do i just need to buy 2 spacers? Thanks

 

Front needs spacers, only other way is custgom brakes and hubs, and that's going to be a mess and cost a fortune.

 

also note you can use the washer bottle and coolent batt tray from a forth gen to free upsome space under the hood.

 

Thats what im gonna do on my rs. 4th gen coolant reserve and wiper fluid reserve.
Ive never liked the 3rd gen reserves.

 

Great thanks. you saved me from a giant headache.

 

Both good ideas. Im looking to use as much as i can to improve or just make a little newer. Thanks.

 

Anybody know where the best place to buy wheel spacers is? And is 2" 5x4.75 to 5x4.75 the right size. Thanks again

 

so the forth gen rear end doesnt need spacers if youre running third gen rims? i thought the rear end was longer on the forth gen. am i wrong?? hope i am lol

 

Yes, the 4th gen's rear-end is quite a bit longer than the 3rd gen car's rear. If you use 3rd gen wheels on the 4th gen rear on a 3rd gen car, they're gonna stick WAAAAAY the hell out. For example, like this forum member's car:

 

If you look at my rear wheels, they sit flush. I have a 95 Camaro Z rear end. The front wheels are sitting in a lot and rub. So that is what your rear wheels will look like. I do want to know more about the spacers. The patern that you listed was the right size, but thickness can vary depending on wheels.

 

Also, i have two full coils cut off my front coil springs, so it sits a lot lower then stock. Gonna be raising it here soon.