I'm replacing the Fordomatic in my 55 Tbird with a C4 transmission. I know that the C4 and 57 Tbird speedometer cable and driven gear are the same, unlike those used in 55-56. I know there is precious little space to work in, so I will be installing the cable in the C4 transmission before the engine & transmission are installed.  Here's my question: If I use the C4 speedometer cable & driven gear and install them while the engine and transmission are out of the car, will I need to use a cable angle drive as was used in 55-56? 

When I went to a C4 in my 56 Bird, I installed the engine and trans before installing the speedo cable.  Because of the lack of room, I used an angle drive.  In my opinion, there is not enough room to even use the cable installed directly into the trans as the bend w/b to sharp, but if it would fit  it may rub on the tunnel.  Possibly, it may work.  

Because of the way the angle drive is made, I had to get a custom cable .  The cable end for the angle drive had the same type of connector as the end for the speedo.

54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

Did you use the original Fordomatic angle drive & driven gear? Source for custom cable?

Thanks.