Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 6 players
The Official DeucesCracked.com Hand History Converter

Hero (SB): $53.30
BB: $82.70
UTG: $36.35
MP: $49.25
CO: $51.60
BTN: $69.05

Pre Flop: ($0.75) Hero is SB with 6 4
3 folds, BTN calls $0.50, Hero calls $0.25, BB checks

Flop: ($1.50) 7 3 4 (3 players)
Hero bets $1.50, BB calls $1.50, BTN raises to $5, Hero calls $3.50, BB folds

Turn: ($13.00) 4 (2 players)
Hero bets $8

Villain is 29/5/1 over 65 hands. Not much else to go on. Should I be 3 betting flop? I think if I called on the flop, I should have c/r the turn. What line is the best?

SCS, I think you have huge equity here. The only hands really crushing you are 77 and 33, and even passive villian may raise these some from the button preflop. I don't think its unlikely that villian could be betting here with 99+, A7, 76, 75, or a better flush draw, all of which you have huge equity against. You're only a little less than a coinflip if villian had 56 and flopped straight.

Looking at all this equity and what looks like a fish of a villian, I would be trying to get the money in here. With all the draws out, I would bet turn as that may be your best chance to get some of his money if he is on a draw. And if he's not drawing, well you still have great equity against his range imo.

Edit: whoops, i thought villian bet turn and you were wondering whether to call or raise. I still think you need to get more money in on turn, but it seems like you make it a lot easier for him to get away when you donk out on turn. It looks like reraising the flop is best here.

Big 3-bet/3-bet shove on the flop.

Don't know how to play the turn with the action which is why I like getting it in on the flop. Being OOP sucks, take that advantage away from your opponent by committing on the flop.

Just nuke that flop.