Nice haul! She looks very nice, how far into NY did you have to go?
I just researched the spec no. from your pic on the Kohler parts lookup, and it is listed as "basic' which would presume it was a universal replacement engine. This and the configuration of the muffler would indicate a multiple use engine. I didn't go any further with the serial number to decode a possible date range, but paint it up yellow and no-one would know but you
I like Kohler's "newer" parts look up program, much easier to navigate than their older system.
Congrats!!
Jeff (teet)