HOW TO IDENTIFY A MARINE 454 ENGINE WHATS BETTER ABOUT EM?
 

I AM WANTING TO PURCHASE A 454 MARINE LONG BLOCK I FOUNT BUT I AM NOT FOR SURE ON HOW TO BE SURE IT IS A MARINE ENGINE. ANY HELP WOULD BE GREATLY APPRECIATED!

If it came from a boat it might be a marine engine.

look for major rust and pitting in the cyl's

Not much difference minus emission devices
 

Marine applications always used hardened valve seat inserts for sustained WOT use, and sometimes they are four bolt mains, where the passenger car and truck versions did not always have hardened valve seat inserts. Some real advanced salt water blocks have a rust preventing coating in the water jackets from aftermarket re-builders on high end stuff. There will not be any vacuum operated emission devices run off a TVS either if it is in tact still.
Bruce

A LOT OF THEM ARE REVERSE ROTATION

x 2 and they usually are ran with a gear drive

Brass lined intake (water ports) and brass freeze plugs.
Dave

Is it still in the boat?

Well, I am just asking....... :lol:

I rent a building to a marine reapir guy, He has a 454 that came out of a boat setting on the floor and asked him about it, from what he says there is not much difference between marine and car motor, the difference is brass freeze plugs and ? ( can't remember ) getting old. LOL but he will sell motor as it sets for $ 400 its a 4 bolt main with oval port heads that need a freshening.