Once I had the flanges and pipe all welded out I ground off the extra edging that protruded thru the flanges. And like so many things in life cheap gaskets aren’t good and good gaskets aren’t cheap. Took a pix showing both the disparity in thickness and quality of the heat resistance on two different styles of gaskets. And wa la finished version. And yes I am running cherry bombs on a gen three Hemi. Much to the chagrin of many on here! Hah! Nothing says old school like glass packs. Who knows I might even run air shocks!