Made a little bracket and mounted a tach in my Duster. It came with the car, which had no dash pad and was crudely mounted. I made the bracket from 16ga sheet metal contoured around the dash pad I got from Rat Rod Al and used the old screw holes in the dash where it was mounted before.
Turns out that the tach didn't work like it should, so I had an old Sunpro tach in the bin and with a slight modification to my bracket I wired that up...no go either. I ordered a new one. In the meantime I put on a new fuel pump.