LS1 Powerdyne belt size

Does anybody know the correct length belt to use w/ a 6psi Powerdyne kit on a 99 LS1 F-body?
Thanks for your help.

go too ebay.. im sure its a BD11A head unit.. they are are they same and they sell them on ebay for like $35

I'm not asking about the internal drive belt. I'm asking about the 6-rib serpentine belt that drives the blower and all the other accessories. It needs to be shorter than the factory belt. Anybody with this kit or a parts list? I can't get Powerdyne to answer an email or voicemail.

do you have a belt at all? is it just too short or what? just take it too the parts store if you do and just tell them you need one a half inch shorter or longer or whatever it is you need... just too too the parts store they can help you out.. thats what i did when i installed my powerdyne and didnt have the right size belt