[catcher193]

I'd rather call and shove if you flop any equity at all, or 4 bet/call, but I like the first option more with this hand.
I like the second option with 66.
4 bet/fold is for 76o and K8o, nits. and should be done against select opponents (IE when you make money on the pure bluff math (265 to win 220, 2.65:2.2 favorite to win p/f))

oh and, just noticed you colcalled originally which obv matters I like call/shove most flops and don't think its too close. By most flops I mean 763 is good, any flushdraw obv, 446, KJ3, just cant shove on like K44 IMO.