Stenhouse needs to finish 16th or better at Homestead to become the sixth driver in Nationwide history to win consecutive titles.
"That makes us feel good, but we've given up 20 points in one race, so it's not over 'til it's over," he said. "We've still got some work to do, but it feels pretty good."
Stenhouse also said it will be difficult putting a strategy together with his Roush Fenway Racing team for next week.
"It's going to be tough because I'm going to have to not push the limits as much as I like," he said. "I like going for race wins, too, so it's going to be a fine balance there because I want to win that race and win the championship all at the same time. We were close last year running second there at the end and finished second, and kind of had to share the burnout stage there with (race winner) Brad (Keselowski), so hopefully we don't have to do that."