head swap?
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,606
Likes: 151
From: SE Georgia
no. theoretically it will bolt up, and I've heard of people have done it on Mustang forums, but it required custom intakes and lots of machining. the ones who have done it were swapping 5.4's into Stangs and needed 4.6 heads because they were smaller and allowed the motor to fit under the OEM hood.
why would you want Mustang heads anyways? the 5.4 3v flows better and is a better head design than the Mustang 4.6 2v head.
why would you want Mustang heads anyways? the 5.4 3v flows better and is a better head design than the Mustang 4.6 2v head.
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Senior User
Joined: Oct 2004
Posts: 174
Likes: 0
Well i remember the old days when the 289, 302 and 351 head could be swaped with no problems. I just was wondering in regards to the whole spark plug issue. And i also thought that the 4.6 had 4 valves. But ol well.
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,606
Likes: 151
From: SE Georgia
spark plug issue is overblown. Ford makes millions of these trucks and motors. the odds alone dictate an issue will surface...unfortunately Ford also has a small design error by using 2 peice sparkplugs rather than 1 piece. 2+2 = epidemic in some people's eyes
Senior User
Joined: Nov 2006
Posts: 185
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From: Pleasant Hill
anybody know how much a crate 5.4 4v cost. i saw one in a mustang at the local dealer and it looks big and mean. just curious. i dont have the cash for one but everybody deserves a dream or two
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