sorry this took so long to get back... no the tach signal isnt off the msd, so in theory if i just replaced the tach wire going to the motor and to the computer with one from the MSD it would all be good right????? and i have a wire going to the external coil off the MSD box and if i splitt it two MORE times will this effect the strength of the signal? will it be too low for the computer to read it????? thanks again