The only think "stock" in NASCAR is the shape of the body, what's under the skin is all race engineered, so they could build a car that meets the weight rules etc. The issue would be that BMW and Audi would have to build carbureted push-rod V8's... .which is probably not something that they'ld be interested in as they don't sell them.

It's just too coincidental that Audi and BMW both come out with 2 door coupes that are "NASCAR sized" in the same year. AND, that they have a V8 option, more so the Audi than the BMW...

just thinking out loud, probably won't happen...

__________________
You have your way. I have my way. As for the right way, the correct way, and the only way, it does not exist.