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They connect to the dash lighting circuit and dim with the dash lights.
Well i understand that they can but a lot of times people install a seperate dimmer because dimming the gauges with the factory dash will make the gauges just right but the factory too dim etc... But your saying the factory dimmer worked just fine with those gauges?
I like the important items at eye level so I do not look down for a sec on the track. I like Cartmanea's idea for the fuel pressure but I think I will ditch my post turbo and stick it their. Sorry I wasn't trying to butt in on your thread....
Not many shavings, cast turns to mostly dust when you drill it. I used a magnet, vacuum, and a greasy q-tip to clean it out but didn't get much of anything. Tapped it with a 1/8" NPT tap.
Start small and work up 1-2 bit sizes at a time. Cast iron turns to mostly dust when its drilled, so there isn't much danger. Don't use any oil or grease when drilling, when you're done, vacuum the hole out. I also used a magnet and a q-tip with grease on it to get all the little bits from inside, but its not necessary.