Hi, I need some help, I am looking to convert my AC engine Aceca to run an Overdrive gearbox. From my research this was a factory option on the AC engine cars, again from what I understand the Moss box is suitable to accept an A Type overdrive using an adaptor plate. Firstly would this have been the factory fit overdrive (Laycock A Type)? I ask as from looking at A Types they are bulky and would require the widest point of the tunnel to be increased in length considerably as well as the moving of the cross member back. This just seams a lot of modification for something on a factory options list even on a hand built car. Or was overdrive only fitted using the AC Lightweight gearbox?
Any information or pictures of an AC gearbox with overdrive would help me greatly to understand how this was done and confirm I am heading down the correct path. Many thanks David