Better double check on your axle and springs before ordering some.
Not uncommon for leaves to be added or even removed over time. Then u-bolts should be replaced if ever removed, may not be original either.

U-bolts in my mind are an item that you measure and purchase to fit the situation, not to try and match any one else's truck. Too many possibilities and variations exist.

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-