I meant to look at the shop a few minutes ago but got sidetracked. The 7 blade direct drive one you have with that vendor number sounds like the same one I have the shop. I think that it has that same vendor number and it is oem on a 70 RR 383 4 speed car. The last three numbers stamped on it are 224 if I remember correctly. It is an 18” direct drive with a 1” spacer.