I recently purchased a mustang II IFS kit from Speedway for my 53 f100 along with their frame boxing plates 910--54425. These frame plates didn't fit/follow the contour of my frame at all. The Speedway plates were basically straight with a slight stepdown on the front end but didn't follow the slight slope down on my frame. Speedway said they've been selling these plates a long time with no returns... can anyone tell me why my frame and the Speedway plates don't match up ? I'm guessing I'll need to get some steel plate and make my own..

 

I Used cardboard pattern and cut my own from a parts truck frame

 

Revamp,

lots of plates you buy are 'close' and require some fitment. In my opinion they are also too short... I boxed from the front cross member to the cab. But, that's me.

Get some heavy cardboard and trace your frame.. cut out that template and make your own using some 3/32 or 1/8" material... fit them just inside the frame channel and weld them in... little grinding and persuasion and you're done. cheapest way to go...

 

thanks for reply Jniolon...I thought if I could find a supplier to provide the plates it would save me time and trouble to make my own. It's becoming evident there may not be a supplier with exact plates for my frame contour. So guess I'll start the self fabrication process with probably some 7 Ga mild steel plate. I didn't need this schedule delay. I appreciate your reply and your pic, Once I get crossmember in my task of installing motor mounts for the GM5.3 engine into the 53 F100 will be a challenge.