I adapted and simplified this from
this writeup on VEI Systems' website.
Here's the procedure...
The stock boost gauge is on the right side of the steering wheel in this photo...
Remove the A-pillar covers...
Remove the screws on both sides of the dash cover...
Then remove the 2 screws in the dash pad where the center defrost vent is.
Lift carefully, disconnect any wiring connectors and the boost hose, then pull forward... simple!
Thru the windshield, you can see the stock vacuum hose...
With the dash cover upside down, remove the 2 phillips-head screws that secure the pod to the dash cover. Access is easy by just moving the vacuum/boost hose to the side...
The stock gauge can be separated from the pod by removing the two lock nuts...
Remove the vacuum/boost hose from the barbed connector on the stock gauge. Rather than just pulling hard on it, carefully pry/push it off with a small screwdriver or similar...
The VEI gauge is not a perfect fit only because the gauge is not as deep as the stock gauge, and the studs are a little further inboard than the stock gauge...
This somewhat-cutaway drawing better explains the differences between the stock gauge and the VEI gauge. The flat section on the pod with the holes for the stock studs will be called a "mid-plate" for this installation article...
Another drawing explaining the differences. The gauge does not sit all the way on the pod (small gap at "B"), because the stud just barely hit the mid plate at "A". This area will need to be drilled open for the studs to clear...
Here you can see the holes have been slotted open towards the inside, to clear the studs on the VEI gauge...
Trial fitting the VEI gauge to ensure adequate clearance now...
Continued below...
