That's a nice looking dolly. When I started this restoration, I didn't have welding skills. I made my dolly out of 2 Harbor Freight moving dollies. I simply added wood to areas that made contact with the K-member, tranny and tranny tail. It isn't fancy but it got the job done. Now that I have a welder and more experience, I probably would try my hand at fabricating one.
I was thinking the same thing with the harbor freight dollys and some wood. I would like to fabricate a dolly like the one pictured but not sure how many times I would use it. Thanks again for the ideas and info.