I had my mileage corrected to match my existing clocks as i put the anniversary dials in my car (silver), cost me 20 quid, too a guy 2 minsd to do but the clocks have to be out of the car to do this on a mk 3
i have also seen 8v clocks in a 16v so my guess is yes, do your standard clocks start at Zero or ten, ??
the silver clocks start at Zero, so i thibk aslong as u get that the same u should be all good regarding calibration
i can say the 8v clocks have 1 connector on the rear, if yours do too then bingo