On a long and heavy engine its more stable and kinder to the engine.
Can you imagine a 6-71 detroit or perhaps a big KT Cummins hung on a stand from one end?... a whole lot of leverage.

Might not be necessary or what you were thinking for just a stovebolt but sure wouldn't hurt.

•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-