There really is no hard and fast rule with how many ports. Usually other factors become the limiting element as you begin to add ports, size, weight and rotational torque all increase as ports are added.
Yes, we will either need the actual component or a drawing showing port location, size and other critical information.
Standard ports are for all sizes of SAE ORB and 4-bolt flange sizes as well as BSPP. Other types are also available. Contact us for more information or to get a quote.