I think we have to bend a little, you hit it close enough. It is a 72 LT-1. The other, something I just learned in my google search is a 64-65 365 HP SMALL Block. I should have known that, I had a 64 365 horse. Mine didn't have air and I was under the impression that none did. But there you go, the 72 LT-1. Good job, you have the "floor".