Very general question but vs somebody who is 3betting ~20-25(playing ~40 from bb) and c/r a fair amount and is a reg. Can we 3bet this flop expecting to get folds from weak fd's some portion of time or parts of range contains lot of thin value that may fold to a flop 3bet as well some portion of the time? Or do most prefer flat flop jam turn. I mean if i had 57ss and c/r this flop in villains shoes i would probably fold to flop 3bet so just some thoughts appreciated.

Full Tilt No-Limit Hold'em, $10.00 BB (2 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

BB ($1214)
Hero (SB) ($1199.50)

Preflop: Hero is SB with 7, 5
Hero bets $30, BB calls $20

Flop: ($60) 8, 4, A (2 players)
BB checks, Hero bets $40, BB raises to $110, Hero calls $70??????

Turn: ($280) K (2 players)
BB checks, Hero bets $180??, 1 fold

Total pot: $280 | Rake: $0.50