pulley and pump question

I bought a pulley from someone . He thought it was 5/8 x 5". I got it and discovered that it slips over my 5/8 " steering pump shaft (federal). I measured and it looked like 5/8 but when I put the calipers on it , it was actually 11/16. I've never heard of a mopar shaft of 11/16.
can I sleeve this? Can someone use this ?
Author: Zigs