Both of my mustangs are supercharged and the fittings are not welded in, super easy to punch a hole and tap it (and i did it with the motor in the car). it is a 3/8 NPT tap that you need to tap the hole. actually works out to a half inch hole in the pan. i went to Napa and turns out that it is the same size and thread as a pneumatic tool fitting. i picked one up for a couple bucks with a barbed end on it, worked perfectly. if you search in google for "vortech supercharger 94 95 pdf" the first thing that comes up is the installation instructions which you can download. it will have a parts list with all the info for you so you might be able to make up your own sending unit fittings too. hope that helps ya. good luck with the install!