Im pretty particular about all things exhaust exit, barring a bone stock restoration. Form is supposed to follow function, but in cases like exhaust exits, I'm usually willing to move mountains for the look I want. The black circles are my proposed valance exit holes, sub frame behind, and possibly spare well will need mods. My shape gauge was too shallow to assign horizontal ( incoming pipe approach) and transfer the entire radius so I used some wood, a level and pivoting cardboard concave contour to set it up. I then transferred to wood with convex radius and built a buck to mock the valance. Since the valance is a rounded shape and the degree of the attack angle is unknown I'm starting with 45 degrees on the template program and will do a practice hole on the buck. I'll protrude The stainless tips beyond the valance in order to shape the tips to match the valance radius then I'll add a rolled lip to the tips and possibly to the valance opening. Prolly go with body color on back up lights so they blend a bit giving the stage all to the exhaust tips.