he open-raised rather than limping, which narrowed his range somewhat. Still, AK is strong vs that range. If he's likely to call a bigger 3bet, then I'd bet more.

I'd also consider leading this flop. If I check, he seems likely to bet any holding, and I have to decide what to do without having gained any more info. Betting puts at least some pressure on him vs giving him free rein to put it on me.