Here are a few tips to make the "A" pillar gauge install go a little smoother. You gauges should come with a set of instructions which tell you where to connect the Pyro, Boost etc.
When you remove the stock a-pillar post, tip the top away from the steering wheel to get it out. You have to use a little force to get it free of the dash.
Instead of drilling one hole in the a-pillar post, for wires, we cut a
bigger hole behind each gauge hole so it is easier to route the wires. Make sure that you don't cut thru the a-pillar hold downs.
The gauges are "press fit" into the mount. When you fit the gauges to the holes, make sure it is a tight. The mounting hardware for the gauges is not used. This is done so should a light burn out, you can pull the gauge and change it without removing the a-pillar.
When you drill the gauge mount to attach it to the a-pillar, if you are careful you can locate the holes in from the edges so that the push pins do not interfer with the weather strip.
When you install the a-pillar and mount assembly, lay a rag or towel on the dash and a thin rag over the edge where the bottom of the a-pillar goes below the dash. This will protect the paint on the a-pillar.
Gauge lights. Remove the "fuse panel" cover located just inside the drivers door and the panel under your steering wheel. From the fuse panel you can identify the fuse for the illumination of the dash. This is the wire you want to tap for the gauge lights as it is controlled by the dimmer switch. You can also locate the keyed on hot in the fuse panel.