Take a look at the picture - this is the part you will get. Make sure its what you want. It was found in the box as pictured. It does not appear to have any marks where it was bolted on - so it appears to be brand new old stock nos gm part 3724716 the box says pulley and has the group number. please make sure its what you want, do your research - I don't know much about it. it does not appear to have any other marking on it. it is dirty - there is some sort of what appears to be dried up grease or oil and dirt on the back - I rubbed it a little and it did seem to come off. I didn't see any marks or bends in it.

 

Not sure what it fits - but looks like its a water pump pulley for a 1958 -1962 corvette and some other Chevrolet cars - maybe impala, bel aire ?

 

GM 3724816

1959-61 Pass with High Lift Cam ??

1961-63 Chevy Pass with 409 ??