Can anyone tell me if their is a difference in the internal works of a saginaw ps pump from Oriellys -$50 and one from show cars or wherever -$150 ?I have the least expensive " CHEAPEST " ,and I am trying to lower the pressure, I bought BORGENSONS ps pressure reducing kit with the 5 metal shims, dissasembled flow valve added 2 shims as recommended no diff. added 2 more shims as "not" recommended very little diff. if any ! PS is to easy or sensitive ! Not a caster / camber issue ANY HELP WOULD BE GREAT / THANX smitty