I have a ready to run MSD.
Are you wrapping the wires going from the coil to the distributor?
And wrapping the blue wire from the FiTech unit to the coil negative as well?
Any other wires?
Are you using both the HVAC tape and the velcor wrap, then grounding it?
I wrapped the wires from the ECU to distributor with HVAC tape and the Velcro insulator, not grounded. I also wrapped the entire length of the O2 sensor lead with the Velcro stuff. That's it.