For what its worth I have the 3hp dust gorilla system and it works great with my General 24" DS. The DS is on the end of a run probably 20-25 ft (6" pipe) from the collector and wye's off to two 4" hoses into the machine.
It would probably have about a 25% load difference. Remember we beat this horse dead, holes through the center of a beam in either direction have little effect. I=(b*h^3)/12 So it'd flex .3" under use and would yield at 5,000 lbs.
Don't forget the mounting. Most swing mounting is drilled through. This will affect the calculation quite a bit. I doubt it will affect the swing weight figures, but I doubt you get anywhere near a ton. That's based on causing one to fail on the job after a lag had been drilled through.
A 3.5" x 3.5" Ipe beam using Wood Database's MOR and Young's modulus, information would take a 7,640 lb center load to fail. Bending is a bigger issue but i calculated .22" on an 8 foot span with 600 lbs. This is also worst case because the loading is going to be more distributed which gives the beam more capacity.