Idler pulley problems

My A-body Duster has manual steering, so I need to run an idler pulley where the pump goes. I bought a Mopar Idler Pulley Bracket (Part#)04593918AA and a plastic pulley that goes on it. They arrived today, installed just fine, but the bracket appears to be too long by about 1/4" so the pulley doesn't line up with the rest of the belt line. Shortening the bracket would be a *****. I assumed that all these brackets would be the same length. Any suggestions? Chrysler parts people are no help.