Magazine:
3/16 'S'cale Railroading 1990-02/03
Page:
32
Author:
Stan Stokrocki
Scale:
S
Converting an American Models GP9 into a low-nose version is not trivial, according to the author. Includes many construction photos.
Magazine:
S Gauge Herald 1987-04/05
Page:
15
Author:
Samantha Shepard
Scale:
S
This article covers how to convert a GP7 or 9 to a GP18. Includes diagrams.