Proper tachometer
 

I have a 1974 porsche 911 targa with a 1979 3.0 sc motor in it. I am having problems with starting the engine. The engine will turn and occasionally start for 2 to 5 seconds. I have replaced the fuel pump and the ignition system seems to be working. I noticed that the tachometer is the original 1974 tach that came with the car. Should I have a 1979 tach in there since I have the 3.0 engine? Would this be the cause of the no start?

Roland