Glad I was able to help. I reckon the ideal kit for this 379 extended hood would be the Italeri Pete 378 # 3857 Long Hauler kit, it's got the same big sleeper as the Italeri 377 kit. There's a heap of info on Google about this kit.
The Pete hood you're showing is the Clint Freeman 1/24th scale hood. MS-10 You'll notice that it's got the narrow hood strip which is the same as the 1/24th Italeri Pete 378 kit This hood is to convert the Italeri 378 to a 379. Just checked mine, bought it way back in 2002 for $35. The Bill Drennen 379 hood is 1/25th scale, it's to convert the Revell Pete 359 to a 379. It's got the wider hood hood strip the same as the Revell kit.
From memory the only Superbird kit that came with all the factory decals was the Richard Petty version, kit # 85-2360, apparently Monogram got the rights to use the Road runner symbols, all to do with licencing from the movie studio.