Have you sea-trialed this boat?...strongly advise you do prior to cuttin' the check...sounds like you've been over it pretty good, but like MJ says, check that transom...
The motor itself has a great reputation for power and dependability, but just like the Johnsons you are accustomed to, the automatic oiling system on a motor that age is not something I would chance...Provided all else checks out, I'd buy the boat, disconnect the auto-oiler and pre-mix...it's not difficult to do and it'll insure lubrication to the engine...that's my OPINION...lots of those motors still around w/auto-oilers still intact, so it's up to you, but I wouldn't let it stop me from buyin' that boat..looks good...
Looks like it's already got trim-tabs on it...BIG PLUS!!...