Hi guys- I am installing boost and fuel pressure gauges in my 94 T/a.

Where in the firewall did you guys drill, and what size?
What about for the MSD dial that comes with my BTM?

Steve

 

I drill holes to the right (from inside) of the brake pedal on my wifes 3rd gen. I actually pulled back the carpet and drilled slowly from the inside. Just make sure it's not around your feet and under the carpet so you don't rip em out

-Shannon

 

You got a few options, theres the one behind the PCM on the pass side, or you can drill into the firewall on the drivers like i did, i had the dash out so everything was a little easier, i did it basically above the brake pedal i made a 0 gauge hole though so i could run alottt of stuff thru it =)