My SM420 has a plate and serial much like Pin_Head's only my date tag has spaces between characters and a one digit final number, it reads "D 2 8" Now I know the D-2 means it was cast on the 2nd of April, but how do I interpret the single 8? It looks like the screw next to the eight may have smashed over the final number if there was a 2 digit number, but then it would no longer be an SM420 cause they quit makin them in '67. It does look exactly like Pin Head's judging from his pics. Does Napa carry the seal thats inside the nose cone of the input shaft? It wasn't included in my gasket kit, nor do I think its included in the rebuild Kit from Stick Only Transmissions, judging from Pin Head's description of the kit. Any info is welcome! Thanks in advance.