John Reidenbach from Wisconsin, USA. Facebook page Brew-City-Gassers.
Here's some pictures of my build using 1 5/8" Docol Tube R8 for the main roll cage structure of my 1962 Corvette gasser drag car.
I purchased my tubing from Blitzkrieg Motorsports. I bent/welded the cage.
Very nice material to work with - consistant bends, clean and easy to weld with an excellent finish.