360? 390?
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Senior User
Joined: Sep 2001
Posts: 350
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From: Friendswood TX
360? 390?
Any subtle and not so subtle ways of telling the difference between a 360 and a 390 would be appreciated. I have a 76 F-150 Ranger SuperCab LWB, sold to me by a friend who claimed he put a 390 in it.
Thanks!
Thanks!
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
It's impossible by looking, but, the 360 FE had 3.50" of stroke with a 4.05" bore and the 390 FE had 3.78" of stroke with a 4.05" bore.
All of them had "352" stamped by the right-side water inlet if I'm not mistaken.
All of them had "352" stamped by the right-side water inlet if I'm not mistaken.
Elder User
Joined: Nov 2003
Posts: 936
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The only way I know to tell is by looking at the the back of the crankshaft. If it has a half-moon cut in it then it's a 360 I believe, if it has a square cut keyway type deal then it is a 390. I guess one other way to tell is by the way it runs, unless it's a 360 with some perf. mods. Time for someone else who knows more to step in but your best bet would be to go to the FE forum on this site.
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
It means that it is an FE and that is about it. There are no 390s or 360s that had their displacement cast into the block. They were exactly the same.
The only FE that I know of that had the displacement cast into it and only into it was the 428 and you have to pull a freeze plug to see it.
The only FE that I know of that had the displacement cast into it and only into it was the 428 and you have to pull a freeze plug to see it.
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