First thing's first. Anyone want to buy a Land Cruiser? The sad thing is I'm serious, it's getting put up. At this point I still don't know if I have the emotional willpower to let it go.

What do you all thing it's worth? I really don't NEED to sell it, so I'm not giving it away for free by any means.
I've been given the opportunity to buy another Cummins. 2003 5.9L H.O., SLT Laramie, crew cab long box 4x4, leather, 6 speed manual, 190k kms. Originally owned by an old farmer friend of my dad's. It's my dream truck to every option, but I can't even express how much I love my Cruiser. I'm in a dark stage of my life.
Now that that's over with, I've got some more progress. Manual glows. They're beautiful, I've never seen such clean starts in cold weather. How did I hook them up you may ask? Sure I'll tell you. Pull off the kick panel and reveal the Glow Controller (silver box, it's the only thing back there). Unplug the harness from the unit. One of these wires (black iirc) will carry 12v when the key is in the running position, this is the one you want. Cut it from the harness and run a wire from it up to a switch.
Now pop your hood, there is a solenoid/relay on the driver side fender skirt. This is your #1 Glow Relay. It's got two 10awg wires attached with nuts, and a yellow plug wit two 14awg wires. As for the large wires, one will always have 12v, the other won't unless the relay completes the circuit. Unplug it. One of the small wires is ground, other will want to see power. When it does see 12v the relay is switched and completes the circuit putting 12v to your glow plug bus bar. On the backside of the driver side fender there are two square relays, the furthermost one back should be your #2 Glow Relay. Unplug it, you don't need it.
So as of now you have a switch inside that has the current carrying wire from the glow controller harness attached to it, and both relays under the hood unplugged. Run a wire from your switch and tie it into the wire on the relay plug that want's to see power. On my truck it's orange, ground the other wire, it should be black. Use a good thick ground wire and make sure it's a good clean connection. You're done.
This is what you have accomplished. When the key is in the running position your switch has power. When you press that switch you allow 12v to flow through it to the #1 glow plug relay on the fender skirt, which in turn closes and allows current to flow through up to the bus bar, putting 12v to your glow plugs. It's that easy, you get to learn pretty quick how long you need to hold the switch for, I've been doing 10 seconds in the morning in -10C and I see clean quick starts everytime. When it's super cold you can use the switch to heat up the glows to smooth the lumpy idle out.
You can, but SHOULD NOT run factory 6v glow plugs, you could burn them out or even worse blow a tip into your precups. I'm running NGK 10.5v Y147t plugs. Some people run 14v plugs too.
Here's my switch setup, it's a momentary rocker switch. On the once side of my steering wheel I have the compressor and glow switch, on the other side I have the front and rear locker switches. So fresh so clean.