Serpentine belt system

[Bubsco]

I have a line on a serpentine set up out of a '92 350. I have a '97 350 crate in my burb and trying to figure out if it will fit. I have read allot about that some models need the block drilled and tapped for one of the bolts, but I am not sure what years this applies to?

Anyway, any help on the liklehood the unit would fit, would be great?

Also, does any one know when chevy went to the new AC refrigerent from the factory? and what alternator amperage would a '92 have run with?

Thanks as always for the great board ...