"We had a very stable car last year, so we should have a good starting point for our setup.
This is our first race with the all-new electrical system mandated by NASCAR, so we are working hard to make sure we have no issues with it rolling into the weekend," Long said.
Hill is one of four drivers to pilot the open No. 66 entry in 2026, alongside Josh Bilicki, Chad Finchum, and Casey Mears.
Garage 66 bypassed the exhibition All-Star Race at Dover Motor Speedway to focus resources on the Coca-Cola 600.
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The team has announced plans to run at least six more Cup Series events later this season, including stops at North Wilkesboro Speedway, Richmond Raceway, Darlington Raceway, Bristol Motor Speedway, Charlotte, and Talladega Superspeedway.