I know this engine tech but i figured more 3rd geners are going to be able to answer here. my question is what size spacer do i need to put 4th gen wheels on my 87 iroc?
any help would be great. thanks in advance.

Shady

 

If they are stock 4th gen wheels, 2" for the front and back work great.
Some use 2" front and 1.25 on the back.
I'd do 2" all around so if you do swap to a 4th gen rear you can sell the rear pair to someone and they can use them on thier fronts. that is what I did.

 

thank you very much. i really don't like the idea of a spacer but i figured if it was small then i wouldn'tmind so much. o well guess ill have to get some different kind. thanks again