I have 2 small block Chevrolet bell housings and the flywheels that go with it. Standard Transmissions. Both are in decent condition and could be turned to assure flatness. Very heavy. I believe they are both 11 inch. $150 a piece. 3973456N B42 153 teeth is for an older 350 engine. The 839754 777 A60 flywheel is for a 216/235 six cylinder engine. Bell housings 3858403