I just bought and received a "billet aluminum"
pulley set. The invoice reads SB SWP kit which is what I was expecting. However the crank pulley is a 3 groove single piece and it marked "big block" on the box. I'm wondering if the Pre 69 SB and BB crank pulley are the same or if I've got the wrong
crank pulley.
Thanks

I know on a 70 the BB and SB crank pulleys were the same. I assume thats the same thing for a 69, but I don't know for sure.