Do you have an automatic transmission or clutch interlock switch? if so then you need a Ford-style starter for a vehicle with an auto tranny (the bottom post is the neutral safety switch, it only lets the solenoid engage when it is connected to a ground)
This diagram from Painless Wiring might help
http://concrete.warzone.org/pictures...painless12.jpg
Mark
83 CJ-7 and 76 CJ-7 with stuff