Sweet thanks for the insight.
Made a makeshift measuring "device" before I headed out there so I could measure em a bit better then eyeballing it, or scrapping crap off the rims to read the markings.Simple 15.5" pieces of wood to set against the rims bead on both sides to measure width.Then set one piece at the back and measure the backspacing.Looked like simian football while I was measureing them, but got it done :)