I am currently putting a 904 behind my A equipped with a Charlie Yapp Riley two port head all rebuilt by Rich at Antiqueenginerebuilding so far so good. This is the transmission that Art Moore uses in his car. The man who makes the adapter is Raul,he lives in California. I did not by the adapter straight from him but did a lot of research and found his contact information. I had a few questions and he was very helpfull. If anyone needs his contact info send me a private message and I will get it for you I have it at home somewhere.
If you choose to go this route you will have to use an open drive line. In using the open drive line you will need to somehow support the rear end from the twisting forces put on it during take off and stopping. These forces normally would be handled by the torque tube. I chose to use a ladder bar set up. I have a full fendered truck and you really do not see it unless you climb under. I know many choose to use 1936 rear wishbone arms. Whatever you do Do Not use the original Model A Arms they will not hold up.
If you choose to use this 904 trans setup you will also need to fabricate at least 1 crossmember for the rear of the transmission. When I made my crossmember I also made it so that the front of my ladder bars tied into the crossmember.
You will also need to do something with the front wishbone. I also chose to make a crossmember for the front of the transmission. I did this because the 904 adapter bolts directly to the rear of the motor eliminating the original flywheel cover or bellhousing that origionaly becomes the rear motor mounts. I did not feel comfortable with the engine and transmission being only supported by the front engine mount and the transmission mount that is one bolt near the yolk. I incorperated in this front transmission crossmember a place to mount the ball of my original unsplit front wishbone.
You will also need to use hydraulic brakes. I am using a pedal assembly master cylinder combo from speedway.
My truck is currently not on the road but it is not all that far away. The engine and trans are mounted. I have fired up the engine everything seems fine. I need to have a driveshaft made and I will be very close to a test drive.
