You should be able to remove the sheet metal cover over the flywheel. then set the whole thing on wood blocks right there, it's wide and flat so it sits pretty stable. Also place a block under the front motor mount. Not easy to move like that, but will keep it upright and not damage the oil pan.

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-