Do this, sit on the floor and place a piece of cardboard or a couple of boards on either side of your hips and find out how wide you need your seat to be (usually 17"- 20"). Then call the guys at UltraShield Race Seats in western Louisanna and have them make you a pair. they can design the seat for you with the proper tilt, width and height. Some of the best money I ever spent on my Cobra and that was 8 years ago.
Ultra-Shield Race Products
Clois Harlan