Wallace actually stated in an interview after the election that he would have tried to throw the election to Nixon after concessions on civil rights.
Actually, most historians agree that Wallace wanted to help Humphrey win. If Humphrey promised to pause progress on integration, he’s swing his house votes to him. Humphrey would be significantly weakened and Wallace would win the 1972 Democratic nomination.
Wallace did not trust Nixon and viewed him as a threat. Wallace didn’t view Nixon as a pushover like Humphrey. I’m not saying Wallace and Nixon wouldn’t have made a deal, but Wallace wanted to be seen as the guy who stopped integration so he could win the presidency. It was just as important to win northern white ethnic groups as white southerners. A Nixon presidency could prevent that
Wallace was a lifelong Democrat.