Re: 1970 Yenko
Don was an engine builder. I bought one of his engines, and one or two BBC engines from as many other better known engine builders that I could afford to learn any trade secrets they might have had. I was also building engines back then, and what the builders didn't put into their books they carved into their heads. (and I wasn't above the "flattery" of copying their development work).
My point is if you have $200K why not build a Pro Stock car and paint it red (red ones are faster). By comparison to a 2015 COPO Camaro a 1970 Yenko Nova or a 1969 ZL-1 Yenko COPO Camaro is a slug. Only costs a a fraction of the price of the Yenko Camaro and it can be road raced, drag raced, and painted red with big YSC decals all over it if that is what you truly want.
If you want to collect something; try late 19th century impressionist art as it seems to double in value every year.