Thanks, prrjim, for your comments. Although it isn't what I expected, I do like the engine and have already fixed that reverse cross shaft.
The pilot truck is completely different. It has frame and spring detail coined on the sides. It is also shorter. It probably was included with the 2-rail version. I have not found a photo of a 2-rail E6s.
As to the pilot, it is original. It was simply moved back by cutting the frame and tapping two new screw holes on the frame sides. The pilot design made the change an easy one. The pictures are of the pilot on my Saginaw G5. I've no idea how faithful it is to the prototype, but the pictures might be of some use. The pilot frame is a crude casting with representation of brake shoes. The wheels are very close to the pilot.
