Anand, I purchased it off the Samba and had my machinist/son turn the shaft down for a sand-seal which I wanted for the ill-fated first replacement engine for Whitecloud.
I was then convinced by members of this forum to not use it since it's smaller diameter would offer less cooling ability than a stock diameter pulley.
I then found an ISP faux 356 four-hole aluminum pulley in the stock VW diameter which is what I have on Whitecloud's 3rd engine, the beauty Pat built.
mine
yours I'm glad you could use the original, you've got a bitchin motor, that's for sure!