How do you guys keep your headers from cracking on a BAE blown Hemi. Currently I build them out of .065 and after a while they crack at the flange coming out of the head. These are not zoomies they are under frame headers that collect into 1 and come out the side on a 10.5 car. Ive tried supporting them and not supporting them, welding gussets from the flanges to about 1.5 inches down the pipes. Any input would be appreciated.