400 engine?
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Freshman User
Joined: Sep 2007
Posts: 32
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From: butler, pennsylvania
400 engine?
Hi again will a 400 fit into my 1981 F-150 with a 4 speed trany it does have a 300 straight 6 in it now but i want to replace the motor. If I can do that how much work is invovled in the swap ? One more thing is a 400 a small block and is it better than a 351 w
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Joined: Jan 2001
Posts: 56,997
Likes: 2,746
From: Virginia
The 400 is bascially the same engine as a 351m, so the answer is the same as the one in this thread about the 351m.
https://www.ford-trucks.com/forums/6...gine-swap.html
Are you scrounging around for something cheap to put in or are you gearing up to start looking, and want to know what's best? If you are going to be picky, then I would stick with looking for a 351w. A 302 will swap in as easy as the 351w.
You could put anything you find in there, but the amount of work and number of required parts increases.
https://www.ford-trucks.com/forums/6...gine-swap.html
Are you scrounging around for something cheap to put in or are you gearing up to start looking, and want to know what's best? If you are going to be picky, then I would stick with looking for a 351w. A 302 will swap in as easy as the 351w.
You could put anything you find in there, but the amount of work and number of required parts increases.
