Well, I would not call it easy. Luckily this model has the kinematic pilot which really helped lining everything up square with the frame and body!
I removed the kineamtic hardware that allows the pilot to swivel. There is a screw through the pilot that fastens to the frame but of course it permits the pilot to move. So I drilled a hole through the pilot and into the frame. I tapped the hole in the frame and ran a screw through the pilot to fix it and prevent it from moving.
Once I had the pilot properly screwed to the frame I removed it, dremeled off tabs on the underside that would have prevented the draft gear box from sliding into it.
Then I drilled and tapped two hole in it for the kadee draft gear box. I used the two center holes of the draft gear box but that would not have worked on this conversion. I glued a piece of styrene to the pilot as there was a slight gap in the bottom of the pilot to which the draft gearbox would have been mounted. I think I used a piece of .04 styrene, and that made the surface to which the box would be screwed to level.
Then using the Kadee height tool I shimmed the draft gear box to bring the coulper height down. I cut styrene strips that are slightly smaller than the draft gear box and glue them to the box. I then ran a drill bit through the styrene and into center holes of the box. I use a slightly oversided bit and open up the holes slightly. This gives you a bit of wiggle room for squaring the box.
I screwed the box to the pilot and then the pilot to the frame. Measure a second time to confirm correct height and then I put the shell back on.
I don't know if this is the "right' method, but it worked for me. I never did a modern engine so I definintley took it slow as I figured it out. I took me about 5 hours to complete the conversion. I don't know if that is typical. But it was worth the time to me.
hope that helps
So I don't know if the pilot is the correct height from the top of the rail. I use Mario's kits that make everything correct, but I don't think he has a kit for this model. I also think the handrails should come down but I am not the well versed about modern engines. I guess I should look for pics and add the handrails. For now I am happy with how this engine looks. I know the headlight is in the wrong place, but I wanted a Ferromex engine and there are just not a lot of options. I really like this engine and am very happy with it!