88 Is This Jam A Punt?

2-3 NL match the stack, usually plays more like a 3-5. Hero has 630 and is covered by sb (1200) and btn (900). The other 4 are loose passive. Btn has big sizing tells pre, big is better. Sb is a pro.

Hero in bb with 88. Btn straddles 6

Pre: sb opens 20, hero calls, 4 calls, btn makes it 100, sb calls, hero ships 630?