I've got the Pertronix set-up in one of my cars and the stock Knee Knocker Tach works fine.......I wouldn't do this again as the Pertronix unit has a certain Lag time in the car starting......it seems to take about 5 seconds for the unit to energize itself...........I've learned to turn the key on and wait ........then start......it's a little thing that becomes annoying......other than that .....No Problems............Yet......
Ken
