Hello, I am 63 @250 and have a sedan with a 10degree seat. I need the 10 deg. seat to have some leg room, but I am close on the head room. A 20 deg seat will lower you in the car , but you may not have as much leg room. As for sedans vs coupes, they are about the same with one exception the round top coupes like the 40 ford. The round top coupes have alot less head room.
Dave, Northern Ohio Lengends 41