Working on my buddies 95 2500 12 V cummins he just got. We are cobbling a plow together. He also is doing "KDP" on it. Anyway. He has a belt driven Fisher pump and cable valve set up(yes old school). I got an ebay lower pulley and the pic did not look right so I contacted the seller (before buying it) to verify that the lower drive pulley will fit this application (he assured me it was for my application). Well I get the pulley and not even close. So I have decided to adapt a Chevy Big block accessory pulley to the cummins balancer. Need to machine a spacer out of 4" round stock. I have the bolt spacing for the Chevy pulley (3.200"). Anybody have the bolt spacing for the 4 bolt holes in the Dodge Cummings 12 valve. I have the balancer in hand and can measure off of that using gauge pins if needed but I figure I would ask here. Please don't responds by saying get a SHEP pump or insta-act. We know this.