help it just stop's

A common intermittent problem with the factory ECU is the ground connection thru the sheet metal screw. I know you have an MSD 7, but could be the same thing. I am guessing you must constantly fight corrosion in Ottawa. Since the failure sounds repeatable, put an in-line spark tester off one of the plug wires to monitor the spark real-time. I carry one in most of my cars, since just $4 at Harbor Freight.