Most Valuable Tribute Camero ...

[Unreal]

Depends greatly on what you do to make it a tribute. A real L72 motor in an otherwise plain Jane Camaro will make a much more valuable Yenko than a 454 in it, with cheapo Yenko stripes.

But I suspect a ZL1 clone with a real ZL1 motor, or even an early 70s aluminum block would top the list of valuable clones. Now, the ZL-1 would also cost significantly more to build, so I'm not sure building one would be a great investment.

For the record, I think most good restorations are poor investments, which is why we call it a hobby, instead of an investment.