Looking for recommendations for mechanic/engine builder. 575,s have 400 hours on the bottom end. Blowers have been rebuilt 3 times and heads gone through twice. Leak down test is starting to show signs of another top end rebuild. With 400 hrs. Might be time to pull and rebuild. Would be looking for a dependable +700hp.

Griff's Engines in Sandusky.
very well versed in marine applications.
They handled my high performance engines when I was still located up there.