AC water pump pully

[Paul 500]

I'm putting the Air Con back on my 68 R/T which has power steering, the water pump pulley that was on there was only a single one. I've been doing a bit of checking & it seems i need a double if i've got power steering. Does any body know what the diameter of this pulley is ?

[8WHEELER]

This is a 68 440. It has a smaller single groove puley.

Dan

[Paul 500]

Thanks for that.