Pulley size ? on cooling

Man I wish I saw this thread a few months ago. I'm selling my CVF serpentine pulley kit (black) because I went back to V groove, and then I bought the polished v groove alternator set with the single groove pulleys. Well, the alternator bracket is not compatible with the later model 165 amp alternator, only the OEM style (round or square back). This is for my 416" stroker (1971 340 block) Lessen learned, always always read their descriptions carefully and call first if you are unsure of fit/application. I also had to swap water pumps, (exit passenger side).

340 pulley mockup.jpg