My 72 3/4 ton 400 4/spd had a steel crank.Bought a factory 4 spd,truck 440 short block from the dealer in the 80's had steel crank,six pack rods with low comp pistons.Apparently they used the rods up in the 4 spd 440 cars and trucks to the mid seventies. I have a 78 440 crate short block sitting on the engine stand right now,LY rods,cast crank and no pilot bushing machining.

Just about anything was possible.