10/20 Awkward stack sizes with set

[edge]

6-handed. UTG (3600 behind) limps. He seems decent and perhaps not dumb, but I haven't been at the table for too long. Next guy limps, folded to me in SB with 4[img]/images/graemlins/spade.gif[/img]4[img]/images/graemlins/club.gif[/img] and 2900 behind and I call. BB checks.

4-handed to the flop of K[img]/images/graemlins/spade.gif[/img]7[img]/images/graemlins/spade.gif[/img]4[img]/images/graemlins/heart.gif[/img] with 80 in the pot.

I bet 65, BB folds, UTG makes it 320, UTG+1 folds.