* chassis
www.panozgtra.com looks to be pretty defunct these days, and it had a bunch of info. But, if you plug website that into
www.wayback.com then you can find old info from when Wayback saved a snapshot.
This is probably what you're looking for (from July 2017):
http://web.archive.org/web/201707170...is/chassis.htm
My GT-WC has all of those reinforcements. My rear shock mount braces are just 1"x1" steel angle, not round tube.
Mark