^^^the idler was a factory delete pulley that mounted where the oe pump was^^^ as far as mine goes, I trimmed all the unnecessary casting of the truck cover, including the a/c mounts and p/s mount. the added idler is mounted to the water pump, the truck pump has a bolt stand off cast in it just below the a/c mount I just added a proper depth pulley spacer and used the factory tensioner pulley and idler pulley centering bolt. the 2005 cover has 2 idlers and a tensioner. the idler you see between the alternator and new pulley is in the factory location. my mod adds only 1 pulley. 7 rib belt selection isn't bad, my belt number wouldn't help you as noted I use a gm alt and ati balancer
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