Whichignition Box?

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I have had 2 sets of FR wires and both sets I had a problem with the spark plug boot after they were warm, would loose their grip on the spark plug then fall over and melt on the header and create an arc and miss. I have not had that problem with any other plug wire. I will never use a Ford Racing plug wire again.
 
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fwiw, i was running a Summit branded ignition box, yhe older Mallory made units along with an MSD Blaster 8227 coil. Went to start the car after turbo install and mild wire tuck and got cranking only. No issues with ethe car prior, but I suspected the ignition ox. Bypassed it and am now getting that weak spark, no spark with the summit box now
 
fwiw, i was running a Summit branded ignition box, yhe older Mallory made units along with an MSD Blaster 8227 coil. Went to start the car after turbo install and mild wire tuck and got cranking only. No issues with ethe car prior, but I suspected the ignition ox. Bypassed it and am now getting that weak spark, no spark with the summit box now

Hmmmm... My suspicion would then be a wiring problem.