This is going to sound stupid. Cos I don't really buy people who talk about blockers. Got to be the most ridic theory ever.
Rofl at this. George you're a smart guy, how can you "not buy" such a simple concept.
Anyway, that's not the point of the thread.
Do we know any kind of rough idea about his 3bet range? Because from your description of him I think a tight 3bet range is a reasonable assumption. He sounds more cally than aggro, but he's obviously one of these guys that tries to get their entire stack in when they think they have the best hand.
Which means that He's either got AK/KK/AA (but way less likely to have KK because of his sizing) if we think his preflop range is AA-JJ AK. He's going to slow down with QQ/JJ on the turn, so I would definitely fold.
Also, even if he is spacking off randomly we can safely assume that our edge on this field is way bigger than our edge in this hand. I think the risk/reward concept is something which a lot of people underrate (including myself). We just give away too much equity by taking such marginal spots in such a soft tournament.
So yeah, I would call flop hoping for him to slow down then fold turn pretty quickly.