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OK, I went to town to get some different lug nuts only to find what the parts store had was exactly the same as what I had (7/16"-20 Nova/Camaro/Chevelle 1960's/1970's models). So, I guess I have the right lug nuts after all. Thankfully Ambush raised a big red flag to idea of drilling out the bolt holes on my rims. That would have rendered the rims completely useless. So, what I have done is to just mount the wheels back on with the hardware I have. The rims centered up just like Radioguy41 said they would and the bolts are about two threads short from the top of the lug nuts. For now I'm going to leave everything in place as is. I believe the machine is most likely usable in the short term until I gather up new bolts to start again from scratch.