My advice..Tell Boise spring works what you want to do and they can make you up something like the old "Belly Bar" that goes across the frame to anchor your TC too in the front and or back..They could make you one up and you could install it with ease...
Boise spring work does good work and you won't be the first truck camper they have made work on a truck..I would go there in a heartbeat over some of the advice here which will mostly be F-150 bashing..LOL
There are Happi Jack spring loaded turnbuckles that are alot cheaper than Torklift,as an example..
