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Are all 5.0 upper intakes the same?

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Old Jan 6, 2020 | 08:21 AM
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Are all 5.0 upper intakes the same?

The motor in my 1995 F150 is not the original motor. I'm not sure of what vehicle it came from, or what year. I plan on using the upper intake from this motor for my 351 build. The intake does not have the "5.0" printed on it like what is on my other 1995 F150. So my question is, Is this upper intake the same internally as what would normally be on a 1995 F150?

Thanks



 
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Old Jan 6, 2020 | 08:41 AM
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I've got an early model (late 80s) 5.0 upper as above & a later "5.0" in my shop.

I haven't done a real close side by side inspection, but cursory exam, nothing major jumps out except PCV & vac tree location.
 
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Old Jan 6, 2020 | 09:13 AM
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That is an early 5.0 intake.. later models had 5.0 EFI or 5.8 EFI on the top. The confounding thing about this is the 5.0 and 5.8 got different intakes so if you are junkyard shopping for parts you may as well get a complete 5.8 intake.
 
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Old Jan 6, 2020 | 12:14 PM
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I've got the 5.8 intake from the engine I am building. But, I hoped to use the 5.8 lower and mod it to fit a 5.0 upper intake as some here have done. Is it worth the effort to do this? And should I get a "newer" 5.0 intake for this task, or just use the "old" on I have in the pictures?
 
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Old Jan 6, 2020 | 01:50 PM
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OK, I'm not sure how the others addressed this but you may need a custom gasket between the upper/lower parts because there is a pretty bad mismatch in the shape of the ports at the front.

 
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Old Jan 6, 2020 | 04:38 PM
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Originally Posted by andy011
... Is it worth the effort to do this?
Depends on you & your skill level. I've got about $200 in mine + time.

If you can drop $400-$700 for a purpose built 5.8 intake, (no idea what the aftermarket and/or truck ones are up to now) go for it.

I enjoyed doing it. I've got another with welded up port sides I'm doing for a friend.

Creating a gasket to match the lower is no big deal.

I ground all the top casting off anyway, so I can't see it matters, early or late upper.
 
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Old Jan 6, 2020 | 07:33 PM
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Scndsin, your thread on converting the 5.8 lower is one of the ones I have saved for this project. I'm going to give it a go...because the worst thing that can happen is a ruin an old lower intake.
 
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Old Jan 6, 2020 | 08:04 PM
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Scndsin's porting is why I did my 5.8, and used the 5.8 upper, with before and after hp #'s
5.8 upper/lower flow number results b4/aft dyno - Ford Truck Enthusiasts Forums
 
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Old Jan 13, 2020 | 11:27 AM
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Hey Andy, thought I would just put the tools asked about here.



This is my second gen lower welded up (Thanks to torq'ta 5 8)

It's only rough pre-lem work:


 
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Old Jan 13, 2020 | 05:16 PM
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Nice! Thank you
 
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