Not sure if this will help, both pumps should have a Vickers tag with a number on it. If they're the same and the pulleys are identical, that should be your answer. Another choice is to take your pump to a NAPA store. Look for the old guy behind the counter and ask if they can do an "R&R" on the pump. They (used to, at least) send them to A-1 in Phila. You will get your rebuilt pump back, ready to install. Did this with hundreds of automotive components over the years with excellent results. Don't know if they still do it, but worth a try!