Good time to bluff?

no reads.

GAME #1744406168 - (BLINDS $0.50/$1) NO LIMIT TEXAS HOLD'EM - 2006/10/01-13:11:19.1 (CST)
Table "Little Cayman" (real money) -- Seat 10 is the button
Seat 1: moe86 ($78.00 in chips)
Seat 2: pocketduey ($162.90 in chips)
Seat 3: supajo ($120.50 in chips)
Seat 4: mendesdc ($99.55 in chips)
Seat 5: boogerflop23 ($74.65 in chips)
Seat 6: harleyplyr ($356.25 in chips)
Seat 7: happy800 ($108.45 in chips)
Seat 8: Hood9905 ($76.00 in chips)
Seat 9: dodgydave76 ($98.50 in chips)
Seat 10: redgrape ($96.50 in chips)
moe86 : Post Small Blind ($0.50)
pocketduey: Post Big Blind ($1)
Dealing...
Dealt to redgrape [ 7s ]
Dealt to redgrape [ 6s ]
supajo : Fold
mendesdc: Fold
boogerflop23: Call ($1)
harleyplyr: Fold
happy800: Fold
Hood9905: Fold
dodgydave76: Fold
redgrape: Raise ($4.50)
moe86 : Fold
pocketduey: Fold
boogerflop23: Call ($3.50)
*** FLOP *** : [ Kh Qc Kc ]
boogerflop23: Check
redgrape: Bet ($7)
boogerflop23: Call ($7)
*** TURN *** : [ Kh Qc Kc ] [ Jc ]
boogerflop23: Check
redgrape: Check
*** RIVER *** : [ Kh Qc Kc Jc ] [ 5c ]
boogerflop23: Check
redgrape: Bet ($10)

Ballsy, considering your opponent might be a moron incapable of reading the board and action given thus far.

Or might have had you crushed to begin with, KQ.

The no reads thing kills me.

I don't like it because I don't think villain will lay down Kx here, and perhaps not even AQ. Our line looks like a bluff, and he's going to pay off runner runner.

If I had the Ac here I'd bet close to pot size for the same reason, I don't think villain checks a boat to us three times (or twice if he has KJ) and he's going to look us up often.