I have a 56 ford f-100 and 250 with 272 and 292 Y blocks. They both have double 3/8" pulley dampners (C3TE-6316-D, 63/64 truck with two 3/8" belt generator option). Im looking for a double water pump pulley that will bolt on and line up with these dampners. Hopefully it will have the same bolt pattern and shaft hole (3/4").

Is there a pulley or pulleys with a part number I can search for that will be a good match? Im looking for something in the 6 1/4" diameter range to clear the aftermarket generator to alternator conversion sold by John Mummert. It has a 3/4" shaft hole and is 2 3/4" high. The pulley I have now has no number on it to identify it.

I have heard some of the double pulleys on the FE engines are a good swap for this project, but you may have to drill the shaft hole (enlarge) to 3/4".

 

I looked though my pile of Y block parts.....no double pulley but several singles. I'm wondering if only the HD truck Y's used the double pulley.
FE pulleys are pretty big, maybe a SBF will work?

 

What is a SBF pullley, lol?

 

Small Block Ford 289-302

 

Im still going to keep checking all my options and this time Im taking a straight edge. If I lay it across the back of the pulley and it measures 2 9/16" to the inside of the hub, its going to be close. Obviosly needs to be set up for 38 pulleys and has to be real close to 5/8" center to center at the bottom of the groove. I will let every one know what I find.