My brother also learned the hardway, don't put caps under the hood! They hate heat and they only take so much before boom! I kept telling him to install the thing on his box or with a bracket in the cabin of his Samurai.
Wanna see what a Distribution or Transmission Cap will do when it fails
Seen that first hand when I worked for Nevada Power. 500kV generation switchyard. Ears rang for weeks
Nice to see you got another in such nice condition.