Hello Don.Good to see you again. Sorry to read that the chevy is hungry for more parts.

I already feel sure I know the answer but, why do you think you need two belts? It cannot be because you will be spinning that motor that fast! Many Many cars ran a zillion miles on 1 belt for decades and never had an issue.

Even my own coupe runs a single 3/8ths belt, with a 100 amp alternator and never an issue. Do as you wish, it's your car of course.. but I think you're making work for nothing. My two cents. Hope you had a good Turkey Day?!?!?