I pulled a tow hitch off of an 89' F-350 dually at the pick a part because the internet said most hitches sold will fit all F series trucks and Broncos. So, I ground down the rearmost rivet heads in the frame securing the gas tank, and sized up the hitch to the frame with bolts, but it didn't want to fit. I would end up drilling the holes in the frame awful close to the outer edges of it, making me question whether any load would rip the sides of my frame. Is that how it's supposed to go? Did I get a doosy?