I noticed that the passenger side head only has two accessory hole and the driver's has three. I haven't figured out where all the brackets go yet but will the lack of the third hole in the pass side be a problem? the one that's missing is the one that's closest to the intake. I'll be running the mixed vbelt/serpentine setup.

 

As for the mixed V-belt/serp setup, I couldn't tell ya. But. I put those heads on my serp setup, and the missing third bolt hole, on the passenger side, the lower bottom corner, was not a problem. On my LB9 it was there for the ground, and I simply relocated the ground cable to the fuel pump blockoff. BUT!!! You still need to retap a hole in the heads. If you look carefully you'll see that the passenger head's hole closest to the intake is off by about an inch. I did have to retap this one. But again, this is on a full serpentine setup.
I waited until the engine was all together to tap the hole; I bolted the accessory bracket into place and used it as a template to make sure that the hole didn't go in crooked or in the wrong spot. It worked like a charm.

 

thats what i just did on a serpentine ,bolted everything up and used the bracket as a template

 

anyone use v belts with these heads?