8 Rib Conversion for 4.6 stang

[S2 Stallion]

I have a Procharger on my stang.
and do to belt slip.....I already bought the RR-NS Pulley for the blower.
so now i bought all the 8 rib pullies for the block. the pullies are just off a f-150 cause they are the same shit but just 8 rib.
the only question i have are the idler pulleys.
i have 2 for my set up. a smooth and a ribbed.
the f-150's only have 1 idler.....and its a smooth pulley.
is there or can i get a ribbed idler?
if so...where? or does anyone have a part number?

 

[-SVT- Parker]

Call HCI Motorsports of Sacramento and talk to Cole. He can answer your question and give you a part number (916)643-2291.