Odds question - Omaha8

[manku]

This hand came up in my home game (spread limit 25/50)Omaha8, five cards, not 4.

I have AA26x, opponent has KKxxx.

Flop is K-8-5, I have nut flush draw.

My opponent is very transparent, which is why I know he has KK. He never bets a low draw or even a flush draw.

I think I'm the favorite (slight) here, but could be wrong. Of course, when the turn/river came JJ my hand was dead anyway.

Thanks.

Manku