Here is a pic of what I did.
I used the #201652 Helm from Northern tool on my single ram setup. It's displacement is 6.0. The next size smaller would've been ideal. Too Ols posted their web adress. I had about 2.5 turns L-L Price is $270 for new. The steering column is $45. It's steel and I welded a flange at the angle I wanted for my dash. Then used 4.5" alum tubeing for my bezel, polished it, and used my old hub. I purchased a used a WPM ram for $100. Then about another $100 for hoses.
Something else to keep in mind, all the companies I know of use an external resvior for a dual ram setup. It simply has a hose comeing out and seals to the Top cap on your Power steering pomp.