Cosmo and I made one for his recent 261 purchase, used some scrap steel I had and an hour or so figuring and welding, turned out really nice. And works with most any GM front mount engine that also has a bellhousing on it. And takes up hardly any space when not in use.

Let's see if he can post a picture.

Otherwise, I've made a few of these stands for my Detroits, you may learn something from them in designing your own stand. They can be disassembled for storage and transport, adjust length for 3 or 4 cylinder engines, and fit most all available front mounts.
http://rides.webshots.com/photo/2575188870080251109INLUZW
http://rides.webshots.com/photo/2517430260080251109TFHOvr

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-