difference between 440 & 383

72BBSwinger said
Deck height 383-400= 9.98" Deck height 413-440=10.72" one quick to tell is the water pump boss is flush with the block deck on a B engine and there is a step up from the WP boss on an RB.

Seems to me there's a LOT easier way than that.

All RBs have the ID pad horizontal and immediately adjacent to the valley cover rail.

Photo below, yellow arrow