[Nak]

On this ragged board, against the average loose/passive player (you said no reads), I don't think that top pair is good here one time in 11, which is what would need to be the case to call. It's very close, though, I think, and the pot is huge, so a call might be okay. With the raise on the river, (again with average opponents) I just can't imagine that you are ahead here 1 in 11 times. Of course, this might be one of this situations where calling just to prevent going on tilt might work also. Suppose that a call is incorrect, and you (correctly) fold only to see that you had the best hand. That might cost more than this close decision.

Nak