Norm,
I get it now. So the 4 strokes were now taking precedence with Victa, and they made the bases to suit. Does this mean that all of the newer PT engines from about '04 are long crank? If not, did they start using the spacers for the 4 stroke engines again?

That is quite a horde you have there. If you tore them all down you would make a small fortune flogging off the parts.