351w

I was kidding... LOL :D yes, the bell housings confused a lot of folks. I was told when I had my Cleveland, that 351M heads were the same.
  • Look folks, make no mistake about it! Fords are confusing! 3/8 on one end of the brake line and 5/16 on the other??? LOL :D

That was true. The 351C, 351M and 400 heads are all interchangeable. 100%. A lot even have the same casting numbers.