Its Metric, and I know PMDCable.com sells adaptors for the lines in the truck to barb, so the site might list the size, or Leroy (burning oil) would know
Thank guy. I have been looking at pmdcable and his kit is for LP by pass and what i want to do is using my Cummin pump for primary and leave stock alone as a secondary. I will post pix and PSI between both when i am done with it. Thank against guy