Sorry, though I was replying to a post where you said you had 4.10 or 4.11.. either I was mistaken or the post vanished.

4.56 is most likely in a 3/4 ton


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-