Cobra vs GT water pump pulley

[95Mustang302]

I'm looking to install a vortech in the coming weeks and Its a kit I'm piecing together to do something custom (got the idea from another user). I was told a cobra water pump pulley is smaller than stock, so I went ahead and bought what I was told is cobra pulley from a user on corral. I'm not convinced as it looks like the pulley I have in my car now. If someone could post a picture of their cobra water pump pulley that would help me a whole lot.

Thanks in advance!!

 

[bimmertech]

fwiw i have a cobra and installed a vortech on my car and had to use the vortech pulley. the stock cobra pulley does not work. i bet though that my under drive pulley would work---i no longer have the vortech.

 

[95Mustang302]

ok, isn't an underdrive pulley bigger for the water pump? how would that work?