Aint been able to find a 12v for under 9500$
The 1980's fords are some of the sharpest looking body styles in my opinion, so I would buy the truck and then spend the 5000 you were gonna put into modding the 6.9 put a 12v into the truck and have a really nice pulling truck.
Aint been able to find a 12v for under 9500$