I really like TrainCraft, but I see that the mod is still missing trains. So here's a train idea to add: Amtrak's GE Genesis.

It would be really interesting for the Mod to have Amtrak trains, (the trains and wagons), Like the superliner wagon and the Auto Train wagon

Currently, the BAP Content pack already has the p42, however it is not currently useable in any good form since TIM isn't stable enough, however, much of that bap stuff is being ported into the community edition, so you will most likely be able to use it there when it is added. It will also likely come to the WWCP content pack sometime in the future, WWCP and BAP both being content packs of the TIM rewrite of traincraft.

I liked it, where could I download this BAP, or is it not available yet?

Well it is "Available". But like I said it's not really playable, so if you like staring at it go right ahead but otherwise your gonna have to wait for tim to become more stable. I suggest you hop over to the traincraft discord where someone could redirect you do the bap download, which you will have to take from it's github page since it does not have an up to date curseforge release.

ok, i think i prefer to wait a while