[FWB]

based on the date code you posted, there will not be a casting number on the block.

after about 1967 the block casting numbers don't appear on most blocks.
if it is from a boat and the connecting rod numbers tell me it is, then you have a marine block which is a standard oiling FE with 427 features such as bore size and crossbolts. it will not be a side oiler. a pic of the side of the block can verify this.

the head numbers are not typical of a marine block.
the cranks are cast the rods are 428 type rods with the larger rod bolts.
the reverse spinning motors are not any different except the crank and cam.

they make good street engines, unless your plagued by a bad winterization sometime in its life, and its cracked.

so post some pics and prolly can tell you more......by the way i'd be interested in the reverse motor if he's not..


fred