Babb holds a slim six-point lead (1,203 to 1,197) over Ryan Unzicker following Wednesday night’s race at the Terre Haute Action Track.
Babb finished third in the race and Unzicker ninth.
Billy Moyer won the event, just ahead of Brian Shiurley, who is third in points with 1,165. Brandon Sheppard was fourth in the race and is fourth in points (1,151).
There were only 15 late models in the pits.
The tour is in Macon, Ill., on Thursday night.