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If your planning on working on your truck frame and never have help tp flip it over, I can offer a solution.
1. Bolt a long piece of 3" angle to the front and rear of your frame as close to the ends as possible.
2. Find the center and drill a hole 6" on either side of the centerlin large enough to handle at least a 3/8" bolt.
3. Now take two engine stands (identicle if possible) and bolt them to the 3" angle.
4. Now you can rotate the chassis to gain access to both sides for sandblasting or painting without getting on your back.
This works well and if you have the 4 wheel type, It wont topple over as easy as the three wheel types. Once your done with the stands, sell em to a friend.