"As a side note, the side and intermediate sill spacing is the same on a D&RGW 3000 series boxcar and C&S 8027, I was able to use the original bolt holes in the needle beam."
This goes back to the original orders for the D&RG 3000 series cars and the C&S 8000 series truss rod cars using the same plan from the same builder. The biggest difference was in trucks and air brake equipment. Same car, different jewelry.