Ok, doing a little more research, in the years since I did this lots of people have published the CAN bus info to run the pump, so that's great, but now we have to figure out how much the Volvo pump will flow. I know it's supposed to be running 70 or 80% in limp mode, and that limp mode measures out right under 1GPM for me on my inline digital flow meter. A lot of others have done work with other OEM EPAS systems. I'll put some links here for people in case they want to dig around and learn more.
This one has a note about Volvo pump speeds, and it does seem to verify the ~75% speed, with this known, we should not be looking at Volvo pumps for high performance steering for Mopars. Volvo Electric power steering conversion (Full write up)
A great end to end video and write up, with links to there source and a great google doc with more general info in it.
For myself, I will probably just put the Van pump I have on my Barracuda in the short term as I don't have the energy to deal with another EPAS setup right now and I don't think the Volvo can really be made to work becuse of its low max flow. To do EPAS right, you really need a steering angle sensor to ramp the pump up quick IMO. So one has to add that, or more easily add a VSS signal, but then, you pump is super loud when going slow...
