commander water pump pulley size

[Studecrg67]

I have 2 commander engines one is for a truck and has a 5 inch pulley and is 3/16 inch shorter than the car engine that has a 6 inch pulley. The question is should the 5 inch pulley be 3/16 inch shorter than the 6 inch pulley and the shorter (5 inch) pulley causes the alignment to be off in relation to the crank shaft pulley?

Gary C

[StudeRich]

Without looking these pulleys up in the Truck Parts Catalog AND the '47-'50 Car Chassis Parts Catalog, I can only guess that 3/16" diff. would be the thickness of a spacer maybe?

It could be the problem is on the crank hub and pulley installation.

Or, the water pump hub is not pressed on to the correctl depth.

I am assuming you have a Commander Big 6 (245 ci.) right?

StudeRich