Mackville truck and tractor pull is having a new class this year, the 6500 pound 4X4 class. This is their first year having it. No duellies, drive shaft hoops are recommended but not required. This is a street stock class. More information on NTPA website. Sunday is the antique and 6500 class. One hundred percent payout for the top five. Sorry it's such short notice, I just found out yesterday. Are allowed to have weights on the front end. Maximum of 24 inch hitch height. Minimum of two and a half inches inside diameter clevis. For more information contact Roger Baum at (920)738-6613