I will give you my opinion FWIW. I think there may have been 68, or 69 L89s, but no 70s. I think for some reason that novas had no specific suffix number for it. The nbr being the same as an L78. That's why you can't find any by using the suffix code. The proof will be on the window sticker, or dealer order if by nothing else the price. Al heads were around 400.00 more than cast iron. I have seen a dealer order like that, but not the car.
Now, all that said, I could be wrong. Howie, and me are both old. Seen both L89 camaros, and chevelles back in the day, but no novas. Never even any urban ledgends about one. But I owned a Yenko back then, and never saw or heard of a copo either. So who knows. I'm still hopein.
