This is the reason I think custom modpack servers are a bad idea, it's important to a server to be on an already popular modpack otherwise there would be no searches for it and therefore no new players. As this would be a custom modpack there wouldn't be an existing popularity to bring in players. Eventually players quit or they move on to another of our server, or they get banned, it's inevitable to run out of players. This branch is an unofficial derivative until otherwise stated by Mrbrutal and or Spitfire4466. The overarching purpose of this fork is to contribute to the overall Traincraft project by bringing it to newer Minecraft versions. We've had plenty of custom modpacks servers that haven't worked out for various reasons, the thing is that a modpack like this would become populated by the network's regulars and that would be about it. This specific fork is maintained by EternalBlueFlame and is intended to port and cleanup Traincraft from 1.6.4 to 1.7.10.
Playing around with adding a new server just for this gimmick and having a custom modpack to showcase it I can't see that working out in the long run.
TRAINCRAFT 1.7 10 MOD
As every player would also have to add the mod separately. As stated, adding a mod to an already existing modpack would hardly be possible, or atleast it would come with alot of hassle.