Join Date: Feb 2005
Location: Smithfield, VA
Bronco Info: 91 302/E4OD/3.55, F-150 cab
-- No, that 351W will not bolt onto your 351M C6.
-- No, all 351W engines used the 351W bellhousing pattern, shared by the 302, 289, 351C, and 300-I6.
-- Your C6 uses a pattern shared by the 351M/400M (same engine block), and 429/460.
If you want to swap from an M engine to one of the small blocks I listed, you'll have to change your transmission.