From what I gather, you need to change the cab/hood from a 359 to a 379 (I think Bill Drennen currently offeres a 1/25 379 cab/hood). I think you also need to swap out the engine, but not sure to which one.
I had a similar issue with the Revell 1937 Delivery Van (which is basicly the same kit). I got the fenders on just fine as I installed them before I put the radiator in (I think), but I could not get the hood to close properly. It's like the radiator is too wide & too tall.
Don't knock until you've tried it, Sergey. I'm sure you could do wonders with that little kit, and you never know, it might be an interesting change of pace.