318 pulley mistake, need the correct size.

MV8 said

3751126, 2-1/4 tall (probably 2-1/8 deep), 5-3/4 od. Good luck!
OEM Mopar Upper Pulley for water pump Plymouth Dodge PN 3751126 340 Non AC | eBay

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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.