You have to be careful if they are low ESR parts. Higher voltage caps have a higher ESR.
Endeco makes the plug in protectors, as well as wall mount. I think they also made a 66 block with built in protection back in the late '80s.
I had a radio station with problems with live call in. On line was over 20 dB lower in level, and they tried to tell me that was normal. The switching center was directly across the street. Less than 150 feet of wire, and they expeccted me to fall for their BS. It turned out to be a bad card in their switchgear.
I had a direct hit on a building. It arced to a telephone cable that ran two miles to the main road. It blew out the SLIC at that point, and vaporized most of the copper in that pair, all the way to the CO, where it took out another card.
No kidding! :(