Also, how do you mount the AEM gauges? Thre is nothing for them to mount to?
The same way that they mount to any console (or our in-console mounting plate sold here) Gauges include a bracket which is threaded to the back side of the gauge that secures the gauge to the mounting suface as shown here:
http://www.aemelectronics.com/images/30-8444-back.jpg
cheers,
-- Chris