by lvrr325
From what I understood, the biggest difference in appearance from GP38-2 to GP39-2 p1 was the 39 has a GP40-2 style dynamic brake hatch, and GP35-style radiator grilles. Starting with an Athearn non-dynamic GP38-2, it was a fairly simple kit conversion - add the '40 hatch and cut the '38 hatch to fill the gap, and cut off or smooth the radiator grille and replace with Cannon parts. Now I believe someone's selling a factory GP39-2.