How much weight can I put on a car rotisserie?

If you have blueprints and a stock list you can upgrade the wall thickness of the stock if you feel it needs it. I made mine from 2"x2"x.250" tube with 13/4" sliders inside. Total cost $250.00 not including casters. I used 750 lb. casters, 2 rigid and 2 swivel with grease fittings. Had a welder tig weld everything. Held my Scamp and then some. Sold it last July for $450.00. Can't beat that deal. You can't overbuild it. What's your life and your car worth?