Help With A/C Pulleys

[1969 beep beep]

Does anyone know what the correct diameters should be on the following pulleys for a 1969 Roadrunner with factory air?

Crank, water pump, power steering and alternator pulley.

I have looked everywhere but can't come up with anything.

If anyone owns an A/C car and could measure that would be very helpful.

 

[Kern Dog]

I have been helping a guy on DodgeCharger.com with this.
I have a stash of misc. pulleys from years of collecting. He thinks the alternator could be a 2 11/16" or a 3" dual groove. The crank pulley is a 7 1/4" 4 groove. The water pump is 5 1/8".

 

[1969 beep beep]

Kern Dog,

Was the crank pulley stepped with two sizes?. I have seen some 7 1/4 for two grooves and the other grooves 7 1/2