8 Rib Conversion for 4.6 stang

I have a Procharger on my stang.
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 **** 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?

68 & 00 GT said:

about how much RWHP will your set up be making ? I think you need quite a bit before that is even necessary. I think Steeda has a kit out w/ choice of blower size pully. I just bought the RR pulley b/c I was told even with my projected ~433 RWHP goal it would not be necessary for the 8 rib conversion yet.

Click to expand...

thats what i thought too. but i have belt slip from 4500 to redline. so im doing it regardless