Why do you ask such hard question?
Most any truck cab will do. If you want to replicate a specific NASCAR driver's transporter, it's prolly gonna take more work. Example: I (eventually) plan to build a replica of the #5 Kellogg's Terry Labonte transporter. Based on the reference pic. I have of his transporter, I needed two different Italeri Peterbilt truck cabs. One for the truck. The other for the sleeper.
Trailer - Well....there's no kit that even close to a Featherlite 53' spread axle NASCAR trailer so that means scratchbuilding and kitbashing. A couple of years back, there was a fellow from the Randy Ayer's NASCAR board who was offering the basic trailer as a craftsmans style it. He supplied the big (no HUGE) sheets of styrene. You supply and do the rest.
This is one of those "Build it before I die" projects. Someday...just not today.
If, on the the other hand, you'd be happy with something smaller (like a Dually pickup and trailer) there are more options. Any of the Dually pickups from the '90's would work just fine to pull a Galaxie trailer. Been there. Done that. Got a '90's Chevy Extended Cab dually pulling one of the small Galaxie tag along trailers with a then current WC MC built to replicate a NASCAR North entry.