Transmission and pto question

[Seanext]

I am working on a 71 4x4 short bed. When I bought it, it had 283 in it however, it came with a 292 in it which is what I want to put back in it. Well I just bought a 292 that came out of a dump truck. It has a sm465 with a PTO attached. I would like some information on the PTO but have hit a dead end in my search.
The PTO is a Chelsea and the number on the tag is A2MHW-2. Is there a website that I get the info on this PTO? Would like to know the speed as in setup for a pump, winch, or whatever.