I’m trying to fire my Cleveland powered pinto but seem to be overlooking something , Moroso switch panel with push button start button. MSD 6 al box wired in  heavy red and black to battery small red to switched 12v source   I have the start regulator mounted in the trunk and is a full new harness going in so am I missing something coming off the I terminal from the regulator to spark this thing up.
There is no key will not be running one.
Any help will be appreciated.
Thanks
  Tony

I wonder if it was a problem with the distributor grounding through the block?   By removing the distributor and putting in the other it made connection now?   I'm not that familiar with the MSD circuits,  but the duraspark one needed a good ground to the block from the distributor.  I've seen people throw parts at this for vehicles that sat for years and it was just corroded around the distributor... . 
    Electronics (with the exception of EPROMs) usually aren't effected by time - that said, the wires and terminals do corrode but technically that's a mechanical failure - Electrons always work.