Is a Chrysler Marine 318 block the same as an automotive 318 block?

MreChristopher

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I ask because I just bought a 66 owens 30' cabin cruiser with twin 318's (obviously). The previous owner said that her port motor had a blown head gasket, and when I fired that motor this weekend I heard a rod knocking HARD! (big surprise) I have paid through the teeth a few times for rebuilds before and have decided I'll just do a swap considering it fired right up and the valves were seating nicely on both banks.

On to the question....
I found a guy with a 318 out of a R.V. that runs very well for a hell of a deal, so I wonder if I can just pull the bad block out of the boat, swap top ends with the R.V. motor (intake, heat risers, exhaust manifolds etc.) and then just drop it back in place?

Thanks in advance guys.
 
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