Got an engine stand that can handle my 394. All gaskets in shop to rebuild motor and trans from gaskets to seals.

guess it is time to pull a big @$$ motor and trans today!

 

I moved your post to it's own thread instead of resurrecting an unrelated one.

 

I think the complete engine is over 700 lb. I recommend fabricating a front support from the engine stand legs up to the water pump, etc. so all the weight is not hanging off the back. I seem to remember it has a couple odd size soft plugs, something like 11/32" that can be hard to find.

 

That '59 394 is probably closer to 750 pounds, use an engine stand that has at least a capacity of 1000 pounds.
Here is how i mounted mine;

 

The 1960 Oldsmobile service manual i have say motor dressed weighs 770. Stands rated for 1200.