Vintage Alco trucks tend to be a General Steel Castings 4 wheel swing bolster truck with a 9'4" wheelbase. EMD GP's tend to use their own EMD swing hanger freight truck (sometimes called a Blomberg truck) which is a similar style B truck but has a 9' wheelbase.
The story around these parts goes Ron was developing an Alco diesel first therefore he tooled the GSC version of the truck. Yes, the trucks are not exactly right (in several ways) for GP's. To address your question, the wheelbase is 4 scale inches too long. A 1/16" in S scale. Chris Borgmeyer --- In [email protected], "David Engle" <rirocket@...> wrote: > > Someone told me years back that the A-M GP-35 has a truck center distance > shorter than prototype so they could use the same frame as for the GP-9. > Anything to this? > > DJE
