68,GT500 water pump pulley

[highland green]

my car #459, DEc9th build. has 1 groove water pump pulley C8OE-8A528A, should I have 2?. Should I have a single or dual groove pulley on Alternator? Thanks in advance. I have seen them both ways. What is correct for Dec build GT500?

[Coralsnake]

I am not sure which you transmission or options you have , but you can find the answers to your questions here:

http://www.thecoralsnake.com/ENGINE.html

There is only ONE correct way

Just scroll to bottom of the page for pulley information

[highland green]

4spd ,no air. i will look ,thanks  

[Coralsnake]

Then you should have a three sheave water pump pulley and a dual alternator pulley

Thats two alternator belts and a third one to run the smog pump. Its the same pulley as the Cobra Jet cars use