"I said, 'You don't see this right now, but I promise you this run today did you more good as a race car driver than you'll ever, ever imagine,'" said the elder McReynolds, who also worked as Dale Earnhardt's crew chief.
Lofton, the polesitter, was second and Hackenbracht third. The starting order was determined by owners' standings after qualifying was rained out.
Lofton and McReynolds passed Hackenbracht coming out of a restart with four laps to go.
"We moved there at the end of the race just a half-lap too soon," said Lofton, who led 56 laps. "I really feel like we held back a little bit more we might have been able to hold on."
Hackenbracht led 37 laps despite working with only a three-man crew.
"To come up and run with guys got 10 or 15 guys working on their car, we feel really good about that," he said.
The race was marred by a late scare involving Mike Affarano. He smashed into the outer wall after Zach Ralston made contact from behind, then flipped six times before landing on the driver's side. He was treated and released.
Joey Coulter, George Cushman, Mike Harmon and Bobby Gerhart were treated and released at the infield care center after a 12-car crash just 11 laps in.
Gerhart raced to his eighth Daytona victory in February.