So, got my GW back from the shop after putting a new 4BBL Carb and Intake on. It ran great on the way home and the next day. Parked it for an hour and then it would not turn over. Lights were bright and windows worked just fine. No clicking or anything from the solenoid, no noise from the starter at all. I replaced the solenoid and still nothing. I jumped the solenoid (connected the pos from the battery to the starter side of the solenoid and the engine fired right up. Drive it home (about 5 miles) and it ran just fine. Once back in the garage, turn the key, and again, nothing.
The truck is a 1986 Jeep Grand Wagoneer with a 360ci (5.9L) V8, auto trans, 4x4. Edelbrock 4bbl carb, Edelbrock intake. Pretty stock otherwise, battery, starter, solenoid all 12 months old or less. Fresh tuneup, etc.
EDIT: I forgot to mention that I tried to start it in N as well as P. I went thru all the gears and giggled the gear selector while trying to start. This did nothing.