{Chrysler 300} ps pump psi 57 C

[John Grady <jkg@xxxxxxxxxxxxxxxxx>]

hi , as many may know the 57 pump is problematic   , mine ( rebuilt ) burned up in  and  seized  in 15 minutes at first start  . But sure looked purty .

Dont really trust it 

So looking at designing a mount to hemi for bulletproof saginaw pump , used on most GM for many years and actually Dodge trucks in 70’s , maybe more years . 
found dual vee keyed pulley and there is enough physical space on 300C , so looks doable , initial thought is to weld adaption to the old bracket.  So save hemi ps brackets  
But somewhere in distant past , I think someone told me the large coaxial box runs on 600 or 800 psi , not the 1000-1200 of later mopar and apparently all GM boxes ( and what saginaw pump delivers)  .
The pressure is set by a part of the  outlet fitting , regulator unscrews from outside . ( awwright) And several suppliers make a 600 version to use  it   on mustang rack ; this combo is a favorite of hot rod guys  . 
Does anyone know operating psi of our coaxial box ? 
C and  I think D use it maybe earlier ?  might add to repro parts setup 
thank you , John  


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