My car did not come with a factory tachometer and I have recently purchased one to install. I guess i need to buy the circuit board for a factory tach car but i was wondering if my factory harness would have a tach wire since my car didnt come with one also wondering if i could just run my tach wire from the distributor to the little studs on the back of the tach if that would work? Any input would be greatly appreciated....thanks in advance