Question about Fenders.
The bed box is identical from late 1950 up through somewhere in the 1970's. The late 50-52 fenders have a different shape from the 53 and up fenders so the bolt holes won't line up. All 53 and up fenders have the same shape but at some point in the 60's or 70's they moved the location of the fenders on the bedside up a couple of inches.
Bobby
The only problem is that the 51/52 F1 fenders were different from F2 thru F6. The later ones were indented to conform to the sides of the 8 ft "Express Box." Plus they are 2 1/2inches wider on the F1 than those on the F2 thru F6. So long story short, the F2 thru f6 fenders will not fit because of the indents.
And I don' think when properly mounted on the bed such that the fender opening is centered over the wheel, the front edge of the Bonus Built fender will meet the running board of the Effie - too long I think. You can move it back some but then the wheel opening is off.
The Bonus Built fenders are larger and rounder than the Effie Fenders. And honestly, the Effie fenders should be MUCH easier to find. I might be tempted to sell the Bonus Built fenders you have and buy some Effie Fenders......Probably make a few $$$ in the transaction!
The bedsides with the indentions are the 48-mid 50 beds. I believe that both the 1/2 ton and the larger Express beds had the indentions in the bed sides. These beds also had the curved stake pockets. In mid 1950 ford changed over to the flat sided beds with the square stake pockets.
Here's a shot of the earlier bed with indentions;
Here's a pic of a 1952 bed;
These are both 1/2 ton trucks. The larger trucks with the Express bed have fenders with larger wheel openings and the fenders are slightly narrower due to the beds being wider.
Like you said, anything is possible. I like the looks of our Bonus Built fenders alot better than the 53 and up fenders as well
Bobby








