I ran a later model Jeep without a battery. It wouldn't idle (I think because of the TPS sensor) but it ran fine for a few minutes with my foot on the gas... I have since been told that is a no no.
The 10si should be fine but I eventually have to put something back in the other truck so I might as well get a 12si for this one since it is wired the same. I want to do a little modernizing while I'm at it... relays for the headlights, fusible links, etc...
...and removal of the evil ammeter. I'm reasonably sure that the fire started there