4x4 vs. 2x4 engine perches
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Posting Guru
Joined: Nov 2006
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From: Riverview, FL
4x4 vs. 2x4 engine perches
I got talking to a friend about my engine swap I am getting ready to do. I told him how I am pulling a 351w from a 2x4 truck and putting it in my 4x4. I said how I was going to buy a set of perches from a guy for a 351m 4x4. My buddy said I could use the perches from the 2x4 to put in my truck, but I told him the 4x4 were different from the 2x4. So are the perches for a 351m 4x4 the same as a 2x4?
Cross-Country
Joined: Mar 2008
Posts: 97
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From: KS
The 2wd perches will not work as lostinfords was saying since the frame cross member is in front of the engine. Is this for your '77 F-150? Reason why I ask is that you will be looking for 351/400 perches from another F-150 4wd only. The F-250 perches will not work as they have a different bolt spacing. Also I can't remember if there is any differences between the F-150 perches from year to year. As for the motor mounts I went and purchased some for an early 80's 4x4 with a 351W. If your truck has a 300 I-6 you'll need different perches, but the bellhousing will bolt up. If you have 351/400M the perches should be the same, but you'll need diiferent trans for a small block ford. Hope this helps.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
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From: St Louis
Which part of the bellhousing are you referring to? The 300 bell is not the same as the 351M/400 after the early 70s, when the 400 had a dual bell bolt pattern. If you mean that the manual trans will mate to both the 351M/400 bell and 300/Windsor bell then yes it will interchange.
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Posting Guru
Joined: Nov 2006
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From: Riverview, FL
Thanks guys, I know the bell is the same and I knew the 150 and 250 perches are different. Now another question is, will the z-bar pivot bracket that attaches to the bellhousing from a 351m fit on my smaller bellhousing?
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