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layout
Jim and Robert,I wanted to share a technique I use and it's much like what Jim has shown.
With the vehicle ballasted and on a level slab,I run a 10-ft length of 2" square tubing off the roof and clamped to a step-ladder,with my largest bubble level clamped to the tubing.
You can just 'see' where the roof begins to fall away.I make a witness mark there with tape,and then begin a series of stations at some interval( I use 12-inches) along the tubing,marking each with tape.
From a scale drawing I can transfer the coordinates vertically down,with a carpenter's square/square/speed-square to 'fix' a point above the body with anything handy.
After I've defined the station points,I use a 20-ft length of 1" schedule-40 PVC pipe as a French-curve to connect the points into a smooth curve.
At this point the design is defined and ready for fabrication.
The sides are done likewise after parallel lines are established off the vehicles centerline.
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