I think I can help you on the first part. There's a plug under the front of the intercooler that you can tap into. Check this link out to get an idea of what I'm talking about
.....you'll need an "Oil Galley Plug" to replace the "blank" that you take out. You will thread the adapter (that connects to the stainless steel, braided line) into this. Check out this thread to see a pic of the plug you need to buy:
The tutorial on Scooby Mods tells you that you'll need to remove the intercooler to perform this install. Although it will make it much easier, I'm telling you that it is possible to do it without removing it (small hands and patience help).
I have the Omori 52mm Oil Pressure gauge.
Hope this helps a bit.