[markjohnson]

I've always been under the assumption that something happened at General Motors in 1967 that limited the big-horse stuff on everything except Corvettes. The late year re-introduction of the L78 in Chevelles & Camaros, the extremely rare '67 L79 Nova, and let's not forget the big-car L72's. There were lots of L72 full-size cars in 1966 and 1968 but the '67 L72's are practically non-existent. There's probably a VERY interesting Chevrolet-issued memo floating around somewhere to explain this.