A stripped mustang weighs less than 1500lbs...that means each spindle only needs to support 750lbs...even a single 2x4 can support 750lbs if it is on-end...the X-frame is in the picture above has 2 4x4s each side...and instead of being horizontal is angled....the capacity of the rig pictured above is probably in the range of 5000lbs assuming the hardware holding it together is up to the job. People think wood is weak...they are very much mistaken, as long as its designed correctly, a wooden rotisserie is way more than you need. That being said, if I were to make one...the attaching brackets would still be metal...as well as the spindles, the spindles are going to be where most of the stress is.Do you trust wood with you car though?
On my rotisserie I can do it without help...but its a full rotisserie. I doubt it would be any more difficult with a tipper though...its heaviest as it approaches sideways though..so with a tipper I would def suggest chocks or stops of some sort.How does one tip the car over? Several helpers or an engine hoist?