Read through this carefully BEFORE you buy it as a L30/M20:
http://www.camaros.org/l30m20.shtmlThere are several other things you need to check out...
All you've found thus far is that it doesn't have the original motor.
There are several things in the article that you need to check, for example:
"So it was not well-known (and still isn't3) that the L30/M20 Camaro was the only regular production 1967-68 Camaro outside of the SS/Z28 models to receive the heavy-duty "12-bolt" rear-end, right-side radius rod (in 1967), and multi-leaf rear springs (in 1968), as well as additional performance equipment otherwise exclusive to the SS or Z28 lines."
Good luck!