Ive got a mate with a MSD 6A fitted and his stock tacho is not working correctly. Im yet to take a look at the install so Im not sure how its been connected. If its using the the Tach Output terminal on the MSD or not...
He has ordered a Tach Adaptor which will arrive in a few weeks.
Has there been any definitive success with MSD boxs and stock tacho's? Is the Tach Adaptor the answer?