Rob, there's no sound boards on these two and though I haven't cracked the K-line 4-6-2 steamer open{and I need to since the darn front truck loves derailing}, the lionel has nothing other than the AC motor truck{other is a P/U truck only} and the cam reverser{f/n/r} relay/solenoid...whatever the PC name for that is.
Can that really run on DC? Maybe I need a pic of it to aid in the q/a thing here...