I dont think we got enough value by jamming river. The best hand that a5 beats and makes sense with this line is a7, 54 and Im not sure he is calling a7 calling tbh. I think AA(1 combo ofc) is in his range because you have Ah on the board is Ac so he has As so he is not scared of turn spade and can checkback. 

If you call and win you have 67bb if lose 33bb so its not end of the world if you lose it

But when you lose by shoving you will have only 16bbs and if he calls and you win its 84. In my opinion shoving its too risky in this tournament (main event), because soft is too weak and you can exploit oponnents in more small ball spots. I dont know if its itm or no but I think ME this year had huge overlay so its much more profitable to get into money. also

This spot is awfully close. I'd assume his calling range should be like: 3 combo of 77, 1 combo of AA (I'm assuming he'll play aces this way 1 out of 3 times, I'd expect cbet very often here, propably like 90%, but let's assume it's 2/3), 1 combo of 54s (I assume he's folding offsuit and 3 suits are blocked), 1 combo of 75s, 2 combos of A5, 3 combos of 44.

Total, we win against 44, 54s, 75s = 5 combos, we chop with 2 combos, and we lose against 77, AA = 4 combos. 

If we expect him to miss cbet with 6s8s & AA we should just call - otherwise it's cEV+ shove.

I am wagering all my chips here. If he has us beat, just punch your wall. 

Also, i'd bet bigger river. The river smashes his flop check back and turn calling range. I'd bet around 61500 or something. Could go bigger if he likes calling.