I've been thinking about the gauges and wanted to fess up to not knowing about them. You can hook em up, and they'll read, but I don't know how accurately, as the International and Jeep probably use different set-ups for what voltage makes the gas gauge full and such.
I truthfully don't know anything about gauges. Only one of my trucks has a different style motor in it, and the gas tank is empty when it reads half-full, but the tranny's the same, so the speedo works.