The King (Richard Petty), back in victory lane with Kasey Kahne..

[Ghoste]

So at the end of the day it wouldn't matter whether Petty was sentimental about Chrysler and willing to stay with them for free or if he was a hard nosed business shark who only follow the money trail, the decision will be made by someone else (or a board of someone elses) and he has little or absolutely no input to it.
Ironically, debating here about whether he would go to Toyota or not as a pure business move is a moot point now since he already made a decision to sell his racing enterprise as a pure business move.