Seems like an easy Check-Bomb flop if MP bets and SB folds. (If fish calls then over-call)

SPR will be 2.1 if MP bets 1/2 pot (MP only had $80) and you have +- 33% equity vs. his calling range so you need him to fold 20-25% of the time he bets to your shove.

If it gets checked through a free card is good for you and you can BF most turns 6/10 pot (Only need 30% FE with your GS & no implied odds or counting Ace as outs and I'm sure you have at least that after their flop check has weakened their ranges.) On this particular turn though I would probably call if SB bet, if SB checked I would CC/C-BOMB MP's bet depending...