I'll modify my statement. As far as I know Mopar never used a 2 belt alternator drive on the CARS. I don't know about trucks or industrial equipment. What you are doing is using the air conditioning drive to supplement the stock alt drive. That will work fine as long as you don't have AC, and the bolt on AC crank pulley is the same dia as the crank alt pulley. There were some AC drive pulleys that are slightly different diameters.
