Thanks guys. Your responses gave me a lot to think about.
I've got HPFAP and will re-read the section about odds.
I think I was trying to "robo-tize" my play in late position and take some of the gambling out. Rather than an odds question its more of a situation / position problem.
Example: you would play 68o late with several weak players limping in front. They would pay you off beacuse they can't lay down their big cards to a coordinated board like 457,579.