So the pilot light on our heater has gone out... this is actually the first time I've even looked at the heater in about a year, and it is unlike any I've dealt with before, and I don't know how to light the damn thing... So if anyone can help, here's what I've got.
Heater looks to be about 40 years old

and says 'Armstrong' on the front door, and has a large metal box with this door on it, and another box to the left of the first one with no door.
Sticking off the front is a little unit with a door that hinges off, with a pipe (gas) running through it that takes an L after it enters this box from the main heater unit, and goes out the side of the smaller unit. Once outside the smaller box, here is a smaller valve box with three settings: On, Pilot, Off. Running into this box are two wires which appear to be running through the floor to the thermostat, and a wire running out of the box and back into the heater itself, it seems. The switch doesn't want to turn... and until I know what I'm messing with, I don't want to force it.
Is this wire running to a 'starter' for the pilot lite, and if I turn it to the 'pilot' position, should it light it?
If anyone can help, or needs more details, I would be in your debt.