I want to put the 16" wheels from an '89 IROC onto a '67 . What lugnuts will work with this combination? I think the seat angle is different between the two. I have heard that you need to use two sets of front wheels to get the correct backspacing. Anyone have experience with that?

Im not sure of which lug nuts to use but I do know that there are front and rear Iroc wheels and usually marked. Ive seen people use all 4 fronts or rears and they do make spacers for custom applications to correct the backspacing.

I did some research at the auto parts store yesterday. Both lugnuts use a 60 degree seat angle. The difference is the width of the seat. There is a chrome-sleeved nut with correct thread, width, and 60 degree angle available, but they are $3 each.

Still wondering if anyone has actual experience with a full set of IROC wheels, 4 fronts, or what. Thank you for any help you can provide.