Wheels and Factory Caps Question

[scootermcrad]

I need a little help from the wheel gurus.

I picked up a super nice set of wheels awhile back. Standard 15" GM 6-lug measuring approximately 6-1/2" from lip to lip on the width and about 8" across the inside of the recessed lug area.





I really want to run the factory style caps on these wheels, but at this point I'm really confused as to what caps I need to be looking for and rather or not I need to install clips on these wheels before i have them painted/powder coated.

These are the factory caps I like. I know there is some difference between 1/2 ton and 3/4 ton, 64, 65, and 66.



Someone just tell me what my options are and if I knew what wheels I actually have, that would probably be helpful also.

Thanks for any clarification on this stuff. I'm lost at this point.

THANKS!