Hello Jason. Welcome to the HAMB. I'll give you a case of Busch Light for one of those 427s haha.... Malcolm
They certainly are; but check out the block and head i.d. numbers to be sure its not a 428. (In fact, some of these were built by Holman and Moody) One big caveat, however, try to determine if it was used in salt water!!
This info applies to the standard marine "Crusader 427" engines from Ford. If the engine had a salt water open cooling system, pass on it. An open fresh water cooling engine may be OK, if inspected. The closed cooling system units should be OK too. The block will be the only real value. They are center oiler, solid lifter only engines. If there is any flakey rust in the water jackets, it may be too thin around the cylinders. A .030" overbore is max, and they are thin to start with. Freeze cracks are VERY common, look in the lifter valley and on the block sides. The rods are Cobra Jet parts, and are in some demand. The iron front cover can be used as a engine mount, so rodders may want it. The distributor is a Mallory dual point. The rest is garden variety boat anchor FE parts, i.e. heads, crank, intake, etc. Reverse rotation engines only effected the cam, distrubutor drive gear, the rear seal knurls on the crank, and starter, so no big deal there to correct. A clean block (no water jacket rust or cracks) that can clean up at .020" is worth about $1500. Since repo blocks came out, OEM iron parts aren't is such high demand with the rubber Cobra builders. Keep your eye out for replacement service blocks, could be later side oilers. Steve.