They’re right there on the upper fire wall. Never had one go on me. If it bothers you throw one in the glove box. I have owned 20 or so cars with this device and I heard of the problem but never experienced it.
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Maybe you live in New Mexico or Nevada ... They were notorious for shorting out immediately after a rainstorm ,, they were right on the firewall and rain would run down and into them... What’s really funny is that the good replacement part is made in China , looks identical to that beast but simply has a tiny modern resistor inside the (well sealed unlike the original) can.
I converted a ‘51 Chevy pickup to 12V, and kept the 6V coil and used the same setup on it. Went down to Radio Shack and got a power resistor in an aluminum heat-sink package.
Nope. NY Most of the mopars I owned with them were slant sixes. My boys who live home own 3 volare/aspens. 2 w/ Slant Sixes one with a 318 two bbl. Of course those electronic ignition cars don’t have the ballast resistor. (To my recollection...too lazy to go outside and look)
Ya know there is I believe a rubber seal that seats when the hood is closed. At least I think so.
Btw. I had an engine spark problem once and replaced the ballast resistor. Turned out it was something else. So from that day forward I had that spare.