Hmmm. 405HP and 450 Ft-lbs out of 383 cid sounds more like a diesel than a gas motor. I've never seen anything like that ratio of ft-lbs/$ in a legitimate marine set-up before. Adding the exhaust manifolds, tstat housing and raw water pump is a grand or so (?). I'm bookmarking that one for the future... A couple of gallons of octane booster could fix the problem with 91.
That kind of torque is well past what is recommended for an Alpha and I think it's a bit past a basic Bravo spec. It may be close to the spec limit for a Bravo 1X... That said, Seacrafts are light enough that drives seem to last a long time if you're nice to them.
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