There is no such thing as a "351 big block". ALL Ford 351's are considered small blocks, tho the wacked terminology of "351 big block" is mistakenly and continually repeated by the un-knowing and by many who should know better. Ford Motor Company considers ALL 351's small blocks; 351W, 351C, and 351M. Ford made a 352 big block (FE block like 360, 390, 406, 427, & 428). If that is what you meant, no the transmission bolt patterns are not the same. The 351W and 351C both have the same trans bolt pattern but the 351M has a bolt pattern like the 429 and 460.
Yes. The transmission from a small block must be at 351 Windsor , And C6 transmission if the transmission is a c4 . It will not work
Yes.
yes
yes.
no.
yes
904 torqueflite
NV3500 for small block, NV4500 for big block.
Dextron.
No. Ifyou are going to do that change to a big block,You will have to change the Trans.Also
Yes it will, it is the same bolt pattern.
Yes it will bolt right up.