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My MSD 8.5 wires and boots need a good cleaning. No need to buy a new set as they function fine. I'm looking for suggestions on how best to clean the silicone jackets and plug boot ends. I am afraid to use brake and carb cleaners, although I don't know if either will hurt the wires. I also have...

Pulled a plug after a recent change. Aluminum heads Mopar 452 casting (Eddy head) A/L 3924 plug. About 85 miles si.ce installation. Looks a little lean no? What say you plug readers.