I’ve built this one many years ago.
It’s a nice model and the final result is real good.
From the times they were truly painted in Italian Red.

Studio 27 has a decal set with the Marlboro logos and the grade up parts (wings, radiator mesh, belts, etc). Don’t know if it is easy to find.
Acu-Stion also have a mechanical part set.

Good work on this one.