1948 - 1956 F1, F100 & Larger F-Series TrucksDiscuss the Fat Fendered and Classic Ford Trucks
Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.
You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!
If you knew which Lincoln, that might be helpful. But the number translates to the 351M/400 block. 8H4 is your casting date code, August 4, 1978. That would make it a fairly early 1979 Lincoln, as many engines were installed about 30 days from casting/assembly. There may be tags or decals on the valve covers that might give more clues as to the exact size, 351 or 400.
The only real difference between the two is the stroke/reciprocating assembly. Both engines are 4" bore. The 351 has a 3.5" stroke where the 400 has a 4" stroke. The block, heads, and external bits are the same. If it's apart, or will soon come apart, that's easy enough to check.
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.