Justin from the LVVTA says:

“The limited production numbers of the war-era vehicles means they’re not only very rare, [but] they’re also quite different from the shapes we’re used to, giving them an even more unique and interesting flavour. Taking a slice out of the roof would help with achieving a less bulbous look, and, as with all panel modifications, best-practice panel-fabrication methods should be used. “Despite the vehicle pre-dating the 1955 seat-belt requirements, once the performance levels of an old vehicle have been raised significantly, there’s a requirement for belts to be fitted, as a means of improving occupant safety and recognizing the fact that the vehicle will now perform more like a modern vehicle. “The Hellcat running gear could certainly be done, but it could bring some challenges. The engine and driveline would be fairly straightforward, but there’s no structure in the inner guard area of an older-chassis vehicle, so, with the strut-leg coilover and upper A-arm set-up on the Hellcat, a suitable structure would need to be created to support the front of the vehicle. There are numerous options here: a custom chassis with integral structure or a structure that is added to the original chassis. If you wanted to keep the steering wheel on the left side of the truck, then you’d need to make sure that it continued to meet the definition of a modified production vehicle. This leaves a reasonably wide scope for what you could do, but keep in mind that a change to a space-frame chassis, or using a complete Hellcat floorpan, would almost certainly tip the vehicle into being a scratch-built, and therefore [necessitate] a change to right-hand drive. “Side-exiting pipes are a popular modification to a pro-touring style of vehicle. While they look the part, they make achieving the legal noise limits more difficult, due to there being less room to fit mufflers in such a short distance. “Whichever way you choose to attack this concept, the end product will sure look the part, and, if the right planning takes place, it should be an impressive-looking and -performing vehicle — just make sure you tie those 426 Hemis down tight!”