I'm putting a set of late 80's camaro 5 spoke aluminum rims on my 66'. I believe the original camaro lugnut is a 12mm thread x 60 deg bulge cone? I, of course will need a 7/16" thread. Is this lugnut something i should be able to find locally or is it a special item? I've seen ones with a 60 deg cone but a straight face but i believe i need more of an elliptical face?

Wow, I had just found this information last night, what great timing http://www.chevelles.com/forum/smile.gif
http://autoxer.skiblack.com/irocwheel.html says that Ronal #2160 or McGard #64011 are the ones with the 7/16-20 studs and the proper "cone" to fit the Camaro wheels.

Hope this helps.