sbc vs bbc power steering pump

[dubs68SWB]

I have a '68 swb that I'm putting a 460 bbc in. The 460 came out of a '68 gmc with an original 396. The truck also had power steering with the remote resevior on the side (yuk). I sold that pump for some good $$$ on eBay but kept the gear box. I want swap my manual box for the other on and put on a pwr pump with the reservoir on the pump. I'm really confused as to what will work. I't looks like the bracket makes all the diff. LMC lists it so that it seems (to me) that BBC and SBC are the same, just a different bracket. Is this true, or are the pumps themselves different??? Why wouldn't a BBC pump off a Camaro or Chevelle work??? I really need help or a good link!!!