When did the Ford 351M 400 engine come out?
When did the Ford 351M 400 engine come out? The 351M/400 engines were used in light-duty trucks starting in the 1977 model year. Ford Engineers developed the 400 engine in response to the new Government pollutions requirements that were to start in the 1971 model year. How old is a 1979 Ford 351M vacuum hose? My truck is 30 years old and a previous owner has "tinkered" with the engine bay in the pastto say the leastit gives me a headache just. i have a F with a M.i got it from a friends dad after it had a edelbrock...