My smog pump started making a grinding sound.  Rebuilt pumps seem to be rare and expensive.  I found this pump (Cardone 32436) that looked perfect even though the numbers say it's different.  Turns out it's about 1 inch shorter but will work.  I made a spacer for the bottom bolt, 1" long, 1" od, 3/8" id.  Top hole isn't threaded so I put a 3/8x 3.5" bolt through with a nut.  The pulley and valve mounting holes are metric.  M6-1.00x10 and M8-1.25x16 respectively.  The M8s could be a tad longer if using a lock washer.