The MGB three-synchro overdrive can also be fitted to the MGA.  Details below.

 

MGB Three synchro overdrive conversion

Photo of the mod made to the tunnel for the MGB overdrive.

Modifications to the tunnel required bending the hand brake a bit.

Extended shifter remote, since the MGB box is somewhat shorter than the MGA, this mod will keep the shifter in the correct location.

Tunnel with the new side cover fitted and the top shifter cover in place (painted piece)

Cut out section to make room for the OD

Here is a shot of the finished mount.

Here is a shot of the finished mount.

Cover shown here. It is secured with sheet metal screws so it can be removed if needed.

The original ears are removed and made good