I think you had better check the hydraulic output pressure of the new and old pumps. The requirements of the old hydraulic ram could be quite different from a modern system.

Also, I don't know what you mean by a pressure valve setup to the carburetor from the old pump. My pump just has two hoses to the control valve. Nothing else. Now there usually is something with the A/C to up the idle when the compressor kicks in. Is that what you are thinking about?

______________________________________
Bill Haegele
http://www.bills1964galaxie500.com
http://www.novaccc.org
http://local.aaca.org/bullrun/