Technical Nailhead question

I have chance to buy a 1965 nailhead it is a marine engine it would be going in a car are there any differences in the Marine engine vrs car engine ?

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Not a deal breaker but check rotation............................................

 

May have a different cam and as brigrat says, if it was one of a twin engine set it may be reverse rotation but not likely. Marine conversion involves outside stuff like water cooled exhaust manifolds and possibly special intake with fireproof carb.

 

So if it turns the other way just flip the rear end 180?