big block burning plug wires

I used to run wire boots on the plugs ends of close wires and Moroso looms that kept the wires pulled as far as possible from the headers.
thanks, its just the ends where they are inserted onto the plug, and I even put ceramic boots over the burning ones to no avail...they still burned thru...I made the looms so they stay away from the headers....heres a pix I know its a poor one but it shows I have tried to keep the wires away from the headers as much as possible...they are only burning down where the plug wires connect to the plug

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