[IsaacAsimov]

I don't think the flop decision is really tough, you were just hesitant because of the stack sizes, but you still have an equity edge agaisnt his range that you should be pushing. Calling that monotone flop after the raise will just lead to tougher decisions on later streets. Villain could have AA with the Ac for example. I reraise the flop to 70ish as RAHZero suggested. Easy call to a push.