Vermeer 665a Seized Wisconsin v465D

[TomSRP]

Just pickup up a Vermeer 665a stump grinder. I know they are old. I used them on my summer jobs off from college. This one has a wisconsin v465D. How do I figure what engine to swap the unit with. I know i bought it with issues and with the lack of parts I'd rather just sell the engine and put another one on.

any insight would help. ive search a bunch and have seen posts referencing a case 188 and 207
Thanks
Saratoga