As of now the current list of entries is at 82 cars.
However I did see the Kritz 69 team has bowed out of the race.
Post from the Kritz 69 team
Unfortunately, I am pulling the plug on going to Eldora. The equipment and car owner are getting wore down. I feel we would not be able to run up to the high standards our fans, sponsors, and team expect out of the 69K. We will regroup and focus on the second half of the season. This was the car owners call and you can direct any comments or blame to him. - Donald