73 Pinto 2.0 automatic (pretty sure it's a c4, as a custom made 2-400 stall converter is installed in it)....

Can someone breakout the info on my rear tag... I understand the 3 40, the ratio I think, and 6.7 the type rear,
 but no idea on the rest of the code.

It reads as follows: wgf-f            3cb
                                3 40    6.7   209a