I could say maybe, if I believed such an equivalence could occur and all the side effects would be corrected after.
No. The asymmetry between that degree of pain and that degree of pleasure would be vast. You wouldn't come out the other end of that hour of pain with an intact mind.
Yeah like this would be my issue.
People get traumatized, get PTSD. There is not, as far as I'm aware, a pleasure "equivalent".
I think a more interesting question would be exchanging significant pain for significant pleasure, and the answer is obviously yes because that's what people choose in life every day. "the best/worst" gets you in the zone of awkward metaphysics nobody can properly reason about.