How about using materials related to your trade, like some 1 1/4 or 1 1/2 inch black pipe, various elbows, tees, and unions, etc. and making up a stand with maybe some flat plates welded in place for block and transmission (if used) mounts.  In my mind, I see a couple of rectangular frames, one at ground level, the other elevated a foot or so with four "corner" posts.  Just my 2 cents.  Say "HI" to Cindy for me.

I made up an engine cradle with some scrap 2 x 2 square box and some 2 inch angle iron . Not bad for an amature, even if I say so myself ?? Only took about 2 hrs one rainy Saturday afternoon .For some reason I can't load the photos ???

Lon

Lon

Here is a rear view . Hope this helps .

Lon