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I have never seen a picture of where they might be placed.
Most of the time top of fender back by the cowl and bottom of fender.
But they can be used where ever they are needed.
Also note back when the trucks were built "fit & finish" was not for show.
The gaps were close around the door but may not be the same side to side.
Dave ----
I have took a few fenders off and have never seen a separate per say (shim) washer to adjust gaps.
This below diagram shows a SHIM in VIEW-B box. 382552S-100.
Bottom fender mount bolt/hdwr area, # 382552-S (XX-191-B) shown here as a item, but not ID'ed as a shim.
The back of the fender has only two bolts. One is at the bottom with head facing down, it has some wiggle room, but not a lot. It needs torque to hold the fender aligned. The other is up near the upper door hinge, where the fender bolts to a bracket welded to the cowl vent tub. I don't see where either would be helped with a shim, but then I don't know what it is you want to correct. Then, there are the row of bolts into the inner fender apron, and the two sets at the radiator core support and grille ends.
Mine, the rear lowest portion of the new fender wanted to turn inward. I had to manually twist it a little by hand and hold it with one hand while tightening the bolt upward to hold it there.
I have usually made my own shims for projects using aluminum, steel, etc as needed. With rare exception, I like round holes in my shims, they don't fall out then.
The back of the fender has only two bolts. One is at the bottom with head facing down, it has some wiggle room, but not a lot. It needs torque to hold the fender aligned. The other is up near the upper door hinge, where the fender bolts to a bracket welded to the cowl vent tub. I don't see where either would be helped with a shim, but then I don't know what it is you want to correct. Then, there are the row of bolts into the inner fender apron, and the two sets at the radiator core support and grille ends.
Mine, the rear lowest portion of the new fender wanted to turn inward. I had to manually twist it a little by hand and hold it with one hand while tightening the bolt upward to hold it there.
I have usually made my own shims for projects using aluminum, steel, etc as needed. With rare exception, I like round holes in my shims, they don't fall out then.
A pic of the bracket on the cowl vent tub.
At the bottom if there was a big gap between the fender and the cab body and the upper bolt (shown above) was tight it would bow the fender where it may pop out farther than the door and not look right.
So if the fender & door are level and body lines line up and a gap at bottom you would add shims to take up the gap and keep everything as it is.
If the fender lines are off, high or low you loosen the bottom & top bolts and move the fender to line them up and add shims if needed at the bottom to take up any gap.
Top bolt you would add shims if the fender was in to far from the door & hood to be level.
It is not set in stone if shims are used or how many. You use what it takes to make it right.
Dave ----
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