318 pulley mistake, need the correct size.

Ant said
5 7/8ths dia will should clear the crank pulley and the depth is the same. So it seems like it should work, but why is listed for a 340 non A/C car? Are the water pumps different? IDK, but maybe I could make it work.

I’m not near my FSM but IIRC by 1973 at the latest Chrysler was over driving the water pump by 19-20%.

That’s what I shoot for.