Don't have a B&B but if you incline them around 7-8 degrees you will find they they are much more comfortable.
Another idea if you install tracks.....The natural tendency is to align your seat tracks and seat with the outside frame rail or side pipes. However since the transmission tunnel is not parallel to the outside rail, the seat may contact the tunnel during movement. A solution to this is to mount the tracks roughly parallel to the tunnel but mount the seat parallel to the outside frame rail. The seat will always look right but while being moved it will move parallel to tunnel.
Click my website link
http://www.legacygarage.com/seats.htm for more pictures.