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I went over my options this morning. I've fretted and thought and over thought and thought again how I could make these heads work on the 63 Gal. I had Mustang factory shorties on it when I pulled it years ago. Problem is, I am determined to switch back to the column shifter. It took me 5+ years to find those pieces! Here is shorties on P heads.
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This could actually be workable with massaging. Except the collector runs right through shift linkage.
Here is the flotech headers I bought to use. See how it dumps around the number 3, clears the shift linkage, but is going to cause steering issues. See the massaging I did on 3.
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Here is the Flashshark headers. Just ain't going to work.
Finally, my last option was just plain old factory logs. Confirmed in serval places people have used them with p heads. Yeah that's going to be tight... grinding fun!
Left this morning session thinking I wished I hadn't unwrapped it. Thinking I'm just going to change out the p heads, or modify the piece of unobtatium, and just beat on and use the shorties. Guess the bright side to that is I don't have to remodify my exhaust. And this is why this just keeps getting put on the back burner...
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I have a set of regular 5.0 heads I would swap you…
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I forget Greg.........are you a welder ?
6sal6
If so you have 'plenty' of tubing pre-bent to make something work.........
Last edited by 6sally6 (5/12/2025 3:55 PM)
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Greg…read this.
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I will open the hipo box tomorrow and put it on there and snap a pic. I do not believe the hipo manifold will work on the Gal though I think it's going to interfere with the steering box/shifter bellcrank. That said, I really want to inspect them anyways.
It seems the key to making a header work with P's is the tube needs to come out some before it downturns.
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MS wrote:
I have a set of regular 5.0 heads I would swap you…
If you go with the 5.0L GT40 heads, then, depending on your cam, you may have to install stiffer valve springs. I used the stock 98 5.0L heads on my 351W and I had valve float at about 4600 rpm. I installed a stiffer set of springs and no problem with valve float after that.
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Factory 5.0 headers are junk. I'd bet the cast manifolds flow better. The switch to tubular headers was made to cut cost, not increase performance. A set of decent shorties on the 5.0 made it run like a different car. The pinch at the port causes all kinds of issues on the factory ones. Why Ford couldn't just use a 3/8" bolt without a 9/16" head like EVERYONE else is completely beyond me.
If you want to cut and try I have two sets of used 5.0 headers lying around. One set is MAC the other is Ford Racing as I recall. PM me if interested.
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