Power steering ISSUES...here we go again...

Aloha! A little background first...1966 'cuda 273 totally rebuilt everything in the engine compartment.

Took the original PSP and had it rebuilt. From first start up the PSP was not right. Just scalding hot and after 35 miles on the new engine blew the pressure hose in two. Ordered a new PSP from rockauto...(Rebuilt one) installed and now I get NO ASSIST when parking.

The FSM says this:
View attachment Screen Shot 2012-10-01 at 8.09.03 AM.jpg
items a - d.
How would I change the pressure relief valve? I mean...how can it be wrong and where would I buy one?

Its a funny situation. The pump works fine as the RPM are up. But once the rpms drop...might as well be manual steering.

I can order another pump (number 3) :wack: and I am getting really good at working on the steering... Just dont know.

My other thread related to the old pump.

http://www.forabodiesonly.com/mopar/showthread.php?t=206525

Again works fine when RPM's are up...

Mahalo to any power steering GURU's!!!!