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.