On a flop like that I think I probably just get it in right there, instead of waiting for the turn. I think villain can certainly c/r and call off with some QJ/KQ type hands, especially with a spade. When you wait for the turn you just give him a reason to get scared when a spade, overcard, 9, T, J or whatever else he might be scared of falls – we're not especially worried about him sucking out, but we definitely lose the chance to stack him on some turns. Seems perfectly okay to shove 270k or so over a check/raise of 83k so that's what I do.

When we get to this turn, I don't think we can fold, but villain's betsizing is a little weird. I suppose it's basically the same as a shove since he's not folding unless he somehow has a hand with no equity, which is really tough on this board. Anyway, I think peeling turn is asking for trouble on a monochrome flop like that. If we have the As, I peel, but since we don't, I get it in.