Thanks. I have  looked at everything I can get my hands on and the belt configurations shown do not include the A.I.R. pump. From what I can see the inside crank groove runs to the water pump then back down to the crank. The middle crank groove runs up to the water pump, then down to the inside groove of the PS pump, then back to the crank. The outside PS pump groove runs up to the alternator then back down to the outside groove of the PS pump. The outside water pump groove runs over to the AC compressor, then back to the water pump. No indication of how the A.I.R. pump is driven.

Another question for those reading this: has anyone ever tried to use the A.I.R. pump to create vacuum for wiper door, headlight buckets, or power brakes instead iof using it to pump air to exhaust? The engine I built will not create enough vacuum to operate these items.

I see what you're saying, you have that direct drive belt on the innermost groove(do you have the idler pulley?). I though only the highest HP bigblocks (without air) had that. But if you have the 2 groove power steering pulley it must be right. Wish I could be of some help. There's gotta be someone else here with your setup.  Mike

Mick, Yes that would be a huge help. If you will do this for me, please make sure I can see the position of all the belts and what they drive.

Thanks