Okay, so if I understand you correctly, then I know that is not quite true. On another topic I posted my setup - here it is again:
1. 72 340
2. converted to pwr from mnl
3. sag pmp from a late 80s Dip
4. Mounting brackets from same Dip
5. pwr steering gear from 71 dart
6. hose ? can't remember, but I had to rebend it a bit.
... the pressure hose that will work with above setup can be gotten from
http://www.bouchillonperformance.com/BPEPowerSteering.asp
... but in my case the feed to the pump is the wrong connection type. I have the hose and it matches perfectly, but I never got around to seeing if I could have the fitting changed.