CONCORD, N.C. (AP) -- Dale Earnhardt Jr. said Tuesday he wants to swap race cars with Graham Rahal, but believes it won't be possible because they drive for rival manufacturers.
Both drivers are sponsored by Army National Guard this season. Rahal reached out to Earnhardt on Twitter after Sunday's NASCAR race at Fontana, proposing they swap cars in an exhibition.
Only Earnhardt drives a Chevrolet in NASCAR, and Rahal's car in IndyCar is a Honda. Because Chevy and Honda are direct competitors in IndyCar, and Earnhardt is so closely associated with Chevrolet, he said he doesn't think the swap is doable.
''Well, he drives a Honda, which is more than just a speed bump,'' Earnhardt said during an appearance at Charlotte Motor Speedway. ''If I wanted to drive an Indy car, I'm sure I could get with Penske or somebody who owned a Chevy and take a couple laps somewhere. But it would have been fun to do that with Graham because of the relationship with our sponsor and the history of our families.
''I look forward to meeting him one day, but I think the fact he has a relationship with a different manufacturer is going to make it challenging - if not impossible - for me to drive that particular car.''
Rick Hendrick, Earnhardt's team owner, was in favor of a swap so long as it was just a test session. Hendrick is friends with Rahal's father, Bobby, the owner of Rahal's IndyCar team.
''I think if he wants to do that, it's fine. Not race, but get out and just play,'' Hendrick said. ''Bobby is a good friend of mine, and I've known him for a long time and I think those kind of things are good for our sport and for the open-wheel guys, too.
''We have the same sponsors, so it all kind of works.''
As for the manufacturer conflict, Hendrick wasn't sure. He noted that Jeff Gordon swapped cars with Juan Pablo Montoya when Montoya was in Formula One, and Tony Stewart swapped cars with F1 driver Lewis Hamilton.
''I don't know really if it's that big of a deal, BMW vs. Chevrolet, Honda vs. Chevrolet,'' Hendrick said. ''I haven't talked to Chevrolet. If (Earnhardt) is really serious about doing it, then we need to talk to them. I'm fine with it.''
Rahal said Tuesday he didn't see a problem with the competing manufacturers.
''We aren't promoting Honda and we aren't promoting Chevrolet,'' he said. ''We're promoting National Guard, so I think it should be about the sponsor and there shouldn't be an issue with the cars.''
Rahal also said he was just throwing out the idea on Twitter to Earnhardt after Rahal attended Sunday's race. His Indy car will have the same stylized number as Earnhardt's does in NASCAR, per the Guard's request, and he had previously said he'd like to partner with Earnhardt on outside projects.
''It's something I really wanted to do. I was surprised he responded,'' he said. ''Of course, I felt with the National Guard that it could potentially I would say happen. Media-wise, for sponsor exposure, I think it would be tremendous for them. But I also thought it would be something that would be fun to do.
''Let's see getting Earnhardt and a Rahal, I think the last time those two names were on the same track were the IROC days with my dad. It would be good to go back out there and see what we could do, have some fun.''