i am trying to figure out what gear i have in my truck. its a 1977 f150 4x4 with a 400 and a c6. i tried using the axle decoder i found but its not on there the code im seeing is c09 on the door tag. and the tag i found on the rear axle says this
wdm-ag1 5ec
00 9 344b

 

I think if you look real good on the tag thats on the rearend, right in front of the 00 you will see a 3, meaning its a 3.00.