I need a pulley for my 67 elky project. It has a 327 with factory a/c and p/s. Do I need a single groove p/s pulley or a 2 groove? I found a few on ebay but I`m not sure how many grooves It`s suppost to have. Thanks.

Thanks for the reply but I forgot to mention that this is for a short water pump. I know I need a 3 groove crank and a 2 groove waterpump but I`m not sure about the p/s pulley. I`ve always has p/s pumps with single groove pulleys but none of them had a/c. I don`t want to have to change it out later if i get the wrong pulley.

Here is my configuration on my '70 with 350 SBC with long water pump
and factory A/C, power steering and alternator locations:

Crank - 3 grooves
(inner runs crank-inner power steering-A/C-crank)
(middle runs crank-outer power steering-crank)
(outer runs crank-water pump-alternator-crank)
Power steering - 2 grooves
Water pump - 1 groove

Ok, yours is a long water pump and mine is a short pump so would I still need a 2 groove p/s pulley?