The Drag Pak attached has 318 in it built for Super Stock. It is the only combination of its kind that I am aware of. This car was originally built by Doug Duell and was the first "Drag Pak" in competition. He took a street V6 car and converted it to a Drag Pak car because the Drag Pak's from the factory were not available yet. He ran a 5.7 hemi. The Ross family purchased it from Duell. Putting a SBM in a Drag Pak isn't that unusual since the first Drag Pak's that came out in 2009 had a 360 as an engine option. Putting a BBM in late model Challenger would be different. The only time I remember seeing something similar was in one of the Mopar magazines. There was a gentlemen who swapped a Gen 2 426 hemi into a late model Challenger. It looked like a retro race car, but I can't find a picture of it.