So I have this. The cab number is 8310 and best as I can find it came from a starter set in 1973. It has a 2 position E-unit, no smoke unit, and didn't even have a headlight (I added a bulb.) I tuned it up and now it's a fine runner, but I have no use for a 2-4-0 in my scheme. Now it appears to me that this is based on the 1615 "Baby B6". Does anyone know if I could just swap out the pilot and front coupler from a 1615 and turn this into a shifter? At least then I could have some use for it.