Hi JD, we have a 1988 36' Grand Banks Classic in pristine condition. We have had her for 3 years. Our boat has the original engine, a CAT 3208NA. 210HP. We have 7300 hours and it will start and purr if you just breath on the starter button.
I have seen many GB with this engine. And according to our local CAT dealer, Milton CAT and our nearby resident CAT expert, John Pride, these 3208 engines, particularly the naturally aspirated are bullet proof and with regular care and maintenance will last a life time. We cruise at 1800 rpm and use about 2 gallons an hour. At 33 years old and 7300/ hrs she doesn't smoke and runs like a champ.
IMHO, John Pride Inc in Bowdoin Maine, email@example.com
is ours and scores of others on the east coast and the Great Lakes is the "go to" outfit for all things CAT.
We are CAT 3208NA fans.
I'd go for it but contact John for professional advice.
36' GB Heritage Classic
Potts Harbor Maine