Well, adding the resistor was a no go... Tach didn't work at all with it inline... At idle it reads a little low, but the problem seems to be exponential with rpm's... Idle shows around 600rpm, but 3000rpm reads around 2000 and 4000 reads around 2500rpm. The manufacturers website also mentioned using a capacitor... I will call them on monday to see if they think this will help...
Meanwhile, I started on the front suspension . so far I've found the offset spacers on the drivers side upper control arm heim joint completely shot... Passenger side is perfect... This explains some if the odd noises I've noticed in the front end. Luckily, I do have grease fittings on the upper ball joints... Not sure if they were original or added... But happy to see them.
More tear down monday !!!