So I got my 8 rib crank pulley on, I took it in, and guess what?? ZZP sent me a 6 rib. I dont know how it happened. I ordered this in january, car was in storage so I wasnt in a hury to get it on. Also, I never opened the box to check it out. Kind of dumb fo me dont you think? Anyways I paid to have that dam thing installed and when they went to put the 8 rib belt on they called me and said it will not fit. I sent zzp an email, I hope they fix it or im fucked and will not make they dyno at the end of the month. And to make things worse, The new pulley is on my car so I will have to get the right one and bring it in to be installed and then ship the other one back. Has anyone ever heard of this happening to anyone else?? On the sheet that came with the Pulley/Balancer it says Buick pulley-balancer, does that matter??