How many groove pulley do I need

[73charger440]

Im shopping for a crank pulley for my 440, I'm wanting AC, power steering. I've seen some info that says a 4 groove and then I seen others that say 3 and one belt would run the AC and the alternator. I'm in bad situation My car did not come with a 440 and I bought a whole engine but it did not include any of pulleys or accessory so I'm trying to figure out what I need.

[BLK 68 R/T]

You can run: a) 4 groove crank, single groove water pump, 2 groove alternator and single groove p/s b) 3 groove crank, 2 groove water pump, 2 groove alternator and single groove p/s. If you are running aftermarket a/c then you can run the non a/c pulley setup which is a 2 groove crank pulley and all others are single. An extra bolt on pulley should come in the kit to drive the a/c with a single belt. From the factory the a/c and alternator are driven together by 2 belts. Option a above will have the alternator and a/c driven by 2 belts and then separate belts for the w/p and p/s. Option b will have 2 belts driving the alternator and a/c and then one belt driving the w/p and p/s together.