Thank you for your reply. Do you know the diameter and height of the 1959 - 1962 6 cyl car pulley. My 261 cu. in. engine was installed in a 1950 1/2 ton pick up truck. My problem is the water pump stands out to close to the radiator. I could not fine a short shaft water pump in my area. I purchased a new 1957 chevy water pump that should work after I press down the hub and cut off the excess shaft. The pulley that came off the truck is 4-1/4" OD, Height is 1-3/8", pulley holds a 5/8" belt. (the crank pulley is 6" OD with 5/8 belt). I have some wiggle room on the height of a new pulley and could use up to a 2-1/2" height. I've called Summit and others no luck. Looked on the internet but rarely find the height. Thank you.