Long body pumps
 

Dose anyone have the specs for the clearance for the long body pumps?

Clearance between gears and end plate
Clearance between pump body and gears

I am having a problem when I have 30 psi but it drops off sometimes and comes back up, I have replaced the releaf valve plunger and spring, cam gear is good and tight, pump was rebult with a NOS Argentine rebuild kit.