looking back through my own pictures all I can see are shackles on the front of the front leaf springs. This truck, the 48 2 ton, 52 1 ton, and the 61 F350.

The AD COE trucks used shackles on the rear of the front springs, I haven't worked on one of those.

I believe that the steering setup has a lot to do with where the shackle is on the front springs. Ideally the pitman arm is level and if the steering gear box is forward of the axle, pitman arm moving front to back the shackle is probably behind the axle, and the reverse is true.

I haven't experience any bad bump steer on any of my trucks and wouldn't consider swapping things around just for the fun of it.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-