You will get lots of opinions here. The key is to decide what works within your constraints. If you have flat surfaces to work with, radiused plywood might work. If you have gravel driveway and trussed garage, ratchet strap lifts and harbor freight casters might work better. If you have engine hoist, a center of mass system might work better. Regardless brace your door openings so the body doesn't taco on you and also the bed to keep everything in line.
Hank