If it's a 10SI Alternator that you purchased, I don't know what water pump boss your referring to, that's interferring, but our Alternator bracket kit is designed for the DN, SI, or CS Delco alts. I'm sure using our bracket, you'll be able to install that nice chrome alternator again without any troubles! You do need a 1" longer belt which we have if you can't get one locally. Drop us a line if interested.... BTW- Glenn Thank You for the referral! It's appreciated!
Steve/B&B Custom Circuits