No worries, projects happen at the pace they happen, we all have day jobs.
The wheelbase is close enough. You might end up trimming a bit, but I don't think anyone will notice a fraction of an inch either way.
My Base Camp body (typical) is about 7.5" wide at the cab, so you will need to find some way to extend those mounts out about 2". You can make (or get a tray/slider), maybe longer posts or some way to make it fit the body. It's going to take some work. It's got to be pretty solid, because if you play hard the body will take some abuse.