some of the best deals/parts can be had right here on Moparts,just post in the want section or look thru the for sale section. there are lots of sponcers listed here and its good to support them with biz also
if you use the truck non a/c pullys you can run 2 belts from crank,wp,alt with the non a/c alt brackets.
my set up had PS,but i removed it and the belt fliped right over to the alt with double groove pully.
the right stock pullys and correct alt brackets are the ticket
here is the stock non a/c truck set up with PS