Almost every new vehicle today is serp. Why because it's more reliable period. ...
Modern serpentine drives are w-a-y more reliable than v-belt systems.
Even industrial applications of multi-belt drives common for motors have gone the way of the Dodo.
In a 1600+HP synchronos drive we installed several years ago for a petroleum scrubber the belt was a single banded rib-drive with a hydraulic tensioner (or a "serpentine"
) vs. the multi-belt drive it replaced.
The reasoning is simple - more reliable - more drive contact area - longer life than individual belts - no probel with belt 'miss-match' causing early single belt failure - cost is less vs. multi belts. Besides, the failure of one belt requires removal of most of the others anyway in service, so this system is less time consuming to service as you just loosen the tensioner and replace the belt. (note: this sytem is triple-redundant anyway, so one unit can be rotated out for service down-time for short periods but needs to be returned to duty/stand-by ASAP.)
As far as
I would recommend you look into the Classic Auto Air system for your AC and their new "Resto-Mod" drive system. http://www.classicautoair.com/Restomod_drive_kits.html
I've installed one of these systems in a 'vette (w.BBC) and all I can say is it was the easiest and best fitting system I've used in quite some time!
The owner ordered the black-anodized system and with his black and aluminum engine it looked very trick and clean.
I really like the parts selection, fit and function of the Classic
system vs. the Vintage system (even though I should be more attracted to the "Vintage" name
) and the system being designed to use your original controls is a big plus.
They can even do an "OEM" type system if you want.
Oh, and no - I don't work for Classic Air ...