So I originally bought a complete PS pump from Year One. Turns out is was Junk. So I ordered a new core and kept the sheetmetal part. I get the new core and go to assemble it and the studs from the Year one pump are metric and the core from the parts store has SAE threads. My question is did the original pumps have SAE or Metric studs. I'm trying to figure out what is correct and what is wrong. Thanks for your help.