340 Engine Cast Question

Locomotion said
Casting date on the other side says it all, but you could get an approximate idea of the year by the balancer - cast (with counterweight) or forged (flat face) & a TQ would indicate '71 or newer - if it's all original to the engine.

Thanks Locomotion. Looks like the balancer was added sometime later, i.e. it is a "Direct Connection" piece.