i dont have aftermarket pulleys and i have AC and the smog on there as well. was going to order off summit but it doesn't specify the application other then the size and it has tons of diffrent sizes.
String it, go in buy a belt (last 3 numbers are the belt lentht in inches 845 would be 84.5") and try it on. If it doesn't fit, return it and get another
i wouldn't ever order a belt off the internet. they never seem to fit right. just take a measurement and get one from a local store, that way if/when it doesn't fit it's not a big deal to return it