What I would like to know is if I have to drill and tap a hole in the passenger side head in order to switch to the serpentine belt setup. I think the brackets for the serp. setup use 3 bolts that attach to the head. One head has all 3 hole drilled and tapped and the other has only 2 dirlled and tapped. My motor is at the engine shop right now, so I am wondering if I should have him do the 3rd hole on the head.

 

If it's not too big of a trouble... drill and tap the hole. It not, holding the bracket on by 2 bolts it really no big deal. It will work either way.

 

Drill+tap the hole. Theres plenty of material to do it.

 

Thanks guys, I am having them add that extra hole. I am surprised that the hole doesn't come drilled and tapped from the factory. I guess the corvette serptentine setup uses a different bracket setup that only uses 2 bolts.