Ugh electrical stuff PITA!
Filter wise, I'd use the stock ones as well. Inspectors can be assholes when they see after market stuff. Or build an enclosure. Filters always need to be enclosed. So I guess stock would be easiest.
"Fit" is a loosely used word here hahaha, it might fit, shrugs....bring it back and ask for your money if it doesn't.
$800? What else do you need done anyway other than the tacho and tint?
Going there would be best. If they aren't too busy, look for Ben and tell him I sent you. And yea, he's family
They have been improving, and have come a long way. Still much to do IMO, but yea, still hit and miss
^ never had a problem with that...same thing for me. As long as they prove that they had tried searching but have more questions / doubts or confusion I wouldn't mind helping out.