I bought a F150 4x4 with a 400 and a C6. Both the engine and transmission were replaced at some point by a previous owner. The C6 is the older style (66 - 72?) with the screw in vacuum modulator which would predate the use of a 400 in a dent.

My question is, when did they first start putting C6s in pickups? Were they available with the 385 series BB prior to 73 (FE only right?) or is it likely I have a large or small bell 400 with a car transmission with a truck tailshaft?

Best way to tell the difference with everything installed?

Thx!

 

They were used starting in 67 in trucks. I don't believe the Ford 400 was available with different bell housings. A 400 is a 400. I am not saying someone wouldn't do the change the tailshaft thing, but that would be alot of work to not beef up the tranny.

 

The C6 was used in trucks starting in 67, but the 460 wasn't available until 74. 400 shares the same bell housing as the 460 but is different from the FE. So, I'm guessing you have a C6 from a car. But I don't really know if there is much difference other than tail shafts.

 

Thanks for the replies guys. I am continuing to dig into this.

There is a 400 with a small block bellhousing pattern, unofficially dubbed the "400 FMX block". Pretty rare and popular with the Pantera folks as it will bolt to the ZF transaxle.



It is more likely though that I have a regular 400 with the big block pattern and a car tranny. Any disadvantage to using the car tranny?