4spdragtop or if I'm not mistaken Steve, tell your dad to try convex mirrors, you can buy the small diameter stick on ones from Canadian Tire, I have them on outter lower area of my 68 cuda mirrors and it allows me to see 100% of the blind spot on both sides of the car without having to put my head over my shoulder. Honestly once you train your eyes balls to work inconjuction with the convex mirrors and the original mirrors, there great.