Thanks for the responses guys.
I agree that it's a fold if he jams river. Re: dies irae, I'm not really hoping to get it in on the turn. If he did shove turn, I'm probably not getting away from it vs an unknown at 2am on a Sat. night, but I think it'd be a fold vs a known reasonable opponent.
In game he tanked river for like a full 20 seconds and led for the 150, and I just snap called because I was so relieved he didn't jam
. However, I'm not sure if a jam is better. I think it's close... people do take this line to induce...