Let me see what I can figure out for you, I have the solution linked below:
**SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle # SSF-173-40-2.
There was a generation change in the F-53 chassis, Ford changed the motor to the 7.3L V8. When they did this they decided they wanted to change the actual frame too. This is the issue for you. The part you have is designed for the last generation. You will need the SumoSprings linked above. view full answer...