318 Steel Crank Motor

You sure its a steel crank? Wasn't it a 67 318 only and then a "full premium engine" on big *** trucks? a 318-3 (forged crank 318 engine code) as the block casting number is not what your looking for, it should be on the block, driver side under the head gasket line. http://www.forabodiesonly.com/mopar/showthread.php?t=44201