i have a 1985 camaro f41 and am needing to know what spacers i will need to use for c5 oem corvette rims they are 275/40/17

You'll need 2" spacers all around. I just did that swap. I used 2-1/4" on the front since I have a 4th gen sized rear and like a slightly kicked-out look but 2" will be fine and is what everyone here does.

thanks i got them on but i think the weights on my wheel are rubbing my strut because i hear a clicking noise when i drive but not that bad