yo Richard,
re your Q; "... routing the cables/wires etc through the dash?
see my prev replay;
Locations to route new wiring, tubing for gauges, etc
such as; Clutch Blank Location pic (to route new wiring, tubing for gauges, etc.) in a 96
and the pic I took in my Bronco
it is http://broncozone.com/uploads/monthly_10_2012/post-3816-0-26637000-1350822748_thumb.jpg
Clutch Blank Location pic (to route new wiring, tubing for gauges, etc.) in a 96; Located next to master brake cylinder booster; drill through from engine bay, higher the better; then seal use a grommet & RTV or other sealer to fit hole and big enuf for all wiring & a vacuum hose to install a vac gauge; best low-cost test and MPG helper you can spend $ on
AutoParts2020.com - Gas Saver Vacuum Gauge, PM1520, 2 inch; & many parts & accessories
http://www.autoparts2020.com/rsdev/part_detail.jsp?PART_HDR_ID=87069
or;
Driver's Side Location pic (to route new wiring, tubing for gauges, etc.) in a 91
Source: by California Monkey (Richard, Mama Cass)
http://www.fordf150.net/images/mytruck/vacgauge.jpg
ALSO CONSIDER A GAUGE POD MOUNTED ATOP DASH IN CENTER
Gauge Cups, Panels, and Pods
http://www.jegs.com/c/Gauges-Tachs_Gauge-Cups-Panels-and-Pods/10335/10002/-1
such as
Triple Dash Pod
Universal (8.4" W x 3.5" H x 4.5" D)
For 2-1/16" Gauges
Black
http://www.jegs.com/i/Auto-Meter/105/5288/10002/-1?parentProductId=