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Most likly a bad idea as chopping the roof off is a major body mod, and it would most likely cut the value in half. However it's still an original Yenko. Could do it to a copo of some sort too.
[/ QUOTE ] Not most likely, it's DEFINITELY a bad idea. I don't understand the logic, why care about matching #'s and a car being an original Yenko or COPO if you plan to take the sawzall to it?

There are plenty of clones on ebay every week that would be perfect for butchering. Or better yet, just buy a nice ragtop and clone it however you'd like it, just please, don't even consider hacking up an original Yenko or COPO. If you think Yenko sellers are short with you now, mention that plan next time you call and see what they say.

This site is about the "preservation" of Supercars, we don't even like to joke about cutting them up...I do hope you were just joking right?