'55 thru '59 w/292 or 312 engine w/power steering should work. I could be wrong. The '54 Y block was a 239 cu. in. bastardization of the 8BA flathead to give it overhead valves and such, so the snout on the crank may be a different diameter. There were bolt on second pulleys that would work, too. They just bolted to the single pulley. I can't remember which cars or models used them, though.
An old post on front dampener, pulleys, and front mounts that might be of help depends on your situation. http://forums.y-blocksforever.com/Topic120439-1.aspx