I think lots of the engineering on electronics WASN'T under a" hot hood in the summertime"(song title)

I remember solving my Ford eltectronic on 1974 460 in F250 with an bag of ice over the modual----It certainly was hot to touch---of course-I don't remember ever changing a spark plug after the electronic ign came out. The higher voltage would carbon track inside the caps occasionally and cross fire as they also cross fired with the 7mm wires--then 8 & 9 mm wires solved that