would zr1 17x9.5" front and 17x11" rear wheels fit my 81 camaro? im not sure on the offset or backspacing yet

 

Not positive,but i would say the 11" wide wheel will probably be to wide.I have an 8" wide rim with a fairly good sized tire and it goes from right at the lip of the wheelwell to less than a 1/2" away from the shock.I could be wrong though so if possible try them before you buy them.

 

Maybe, but not with those wheels. Too much inside offset; they'll hit the shocks or springs.

 

the offset is 36, not sure on backspacing

 

Offset is "36"? NOt sure what that means?

 

im assuming its 36mm

 

so that offset wont work?

 

That would be 3.6 cm, which equates to a little over 2" I think. They sure look like they've got a whole lot more than that inside! I thought they had more of an outside offset, than inside. Maybe they mean it's 3.6 cm offset to the inside? Still wont work, unless it's a reverse offset like most custom wheels.
A inside offset of around 2" on a 11" wheels means you will have 2" more inside. Half of 11" is 5.5", so you'd have another 3.6 cm (2") inside for a total of 7.5" aprox. inside. Not near enough clearance!
I've got 10" wheels, with 12" of tire, and my offset is a reverse, so it's 4" inside and 6" out. I just clear the shock and springs.