The headers for the roadster actually came as a kit from Jeg’s which I modified so they would fit.  I got them unwelded so that they would start out to be close to what was needed. The tubes went into my hydrolic bender to get them shaped correctly, then welded into place. Also purchased extra tubing pieces with 45°, 22°, 30° to fit giving the right height and symmetrical look. Nice custom fab job!