What you have there is a 1949 mantua 2-8-2 Mikado. Very rare as a set! I can tell the year right away by coupling pin on rear of locomotive, and also by the location of the bell hanger on the front of the boiler, and the fact that tender has 4 wheel trucks, not 6. There is probably a Very strong 5 pole D-71 motor in there. Go get a peice of surgical rubber or tygon tubing for the drive shaft coupling to the gear box. The black one that is in there is dry rotted Im sure. The answer to your primary question is, Yes. That is the 'long haul' tender that goes with that locomotive. You can, if you choose to, replace the tender trucks with 6 wheel version. Just make sure that you aquire a set from a cast tender with no bottom to it like the one you have. Later models with a cast bottom but a plastic body do not fit due to screw hole being smaller. No, you cannot drill it out, I tried that. The truck just does not sit correctly to begin with.