Haven't read the article yet, but from the info you give it sounds like a bad idea to me.
The small trucks already have small frames, why make it any smaller?

Can you trade your 54 bed for someone with a 47-53?, or sell and buy?

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-