Personally I thing fitting these faces will cheapen the look of your dash board. I thin kyour dials look fine as they are, but each to there own.
If you have to fit them, it depends on whether they are a stick on or replacement faces.
If you have to remove the needles the best way is to place a couple of credit cards (or normal card) either side of the needle and then lever the underside with a couple of dinner knives.