Gentlemen,
Thank you for taking the time to post your opinions. I will try & find a vehicle with 'old fashioned' ignition, great idea.
From the information I received from MSD it looks like the tach adapter is working correctly. It's looking like a new tach is going to be the answer....
Hmmm.... lots of choice here! Anyone got any experience of Elliot tachs??
Elliot Design tachometers and rev counters: Products - Classic
Regards,