Here's the pic of my super cheap gauge install...
Gauge set... 18 bucks from HF... http://www.harborfreight.com/electro...set-41017.html
Piece of sheet metal for mounting the toggle switch... free (scrap in the scrap pile)
Toggle switch... free (neighbor found one in his garage... I know I have a couple toggles laying around, but can't find them...)
Wires to power/ground the gauge lights... free (again, I've got all kinds of crap laying around)
Terminals that were crimped and soldered onto the wires... free (got a couple of terminal kits laying around as well)
Pipe fittings to make the water temp gauge functional... maybe around 5-10 bucks, haven't got them yet.
Overall, the install was pretty easy. I just wired the oil pressure and water temp gauge lights on their own toggle switch, since I didn't feel like tearing the dash apart to access one of the factory gauge light power wires to splice it together... As for the oil pressure sending fitting, that wasn't too hard to install.
The water temp won't be that hard either. I just need to get some 3/8" pipe fittings, like a 45 degree elbow, a coupler, and a short 1-2" long fitting. Then that sender can be made functional.
No leaks with the oil pressure gauge set up. Yet. I suspect it may leak later on though, as everything seems to do so... kinda like some old people have to wear depends. Sadly.