[COBRA406]

Tony,
As stated before, the 351M/400 has a big block bellhousing pattern different
from the small block C. If you want to use the C4 with a 351/400 you will
need a C4 aluminum bellhousing which is different from a C6. They are on
Ebay if you don't have one or only have a C6 bell available. Good luck with
your project.
Bob T.