PL$50: Top set gone too far?

[graarrg]

Paradise Poker Pot-Limit Omaha/8, $0.25 BB (9 handed) converter

Button ($34.25)
Hero ($66.00)
BB ($29.00)
UTG ($34.00)
UTG+1 ($40.50)
MP1 ($14.00)
MP2 ($65.75)
MP3 ($50.00)
CO ($17.50)

Preflop: Hero is SB with 4[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img]. Hero posts a blind of $0.25. MP3 posts a blind of $0.50.
<font color="#666666">1 fold</font>, UTG+1 calls $0.50, MP1 calls $0.50, <font color="#666666">1 fold</font>, <font color="#CC3333">MP3 (poster) raises to $0.75</font>, CO calls $1, <font color="#666666">1 fold</font>, Hero (poster) calls $0.75, BB calls $0.50, UTG+1 calls $0.50, MP1 calls $0.50.

Flop: ($6) 6[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
graarrg : Bet ($6)
maleldil: Call ($6)
ball of fire: Call ($6)
CUERVO : Call ($6)
4u2NVbeautch: Raise ($42)
Dr. Detroit1: Fold
graarrg : Raise All-in ($59)
maleldil: Call All-in ($22)
ball of fire: Fold
CUERVO : Call All-in ($7)
4u2NVbeautch: Call All-in ($7)

Turn: 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>


River:4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(6 players)</font>

Pot: $63.75 | Side pot 1: $42.25 | Side pot 2: $42


1) was my preflop call questionable? I figured KK34 was strong enough to defend a minraise with that many people in the pot

2) should I have bet more on the flop? is this a hand to push?

would I get too many calls from a field that big? This is in the beginning of my Pot-limit endeavors, so I do have a lot to learn.

edit: converter is messed up, so I pasted the flop betting action in.