header fitment

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3404spdfish

3404spdfish

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does anybody know why Sanderson headers DD9-P sold by Summit do not fit a 65 barracuda with a 360in it now, its was a 273 car. i am just curious before i buy them.
 
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3404spdfish said:
does anybody know why Sanderson headers DD9-P sold by Summit do fit a 65 barracuda with a 360in it now, its was a 273 car. i am just curious before i buy them.
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Not sure I understand your question "why they fit"- basically because that's what they designed them to do.
Before you buy from Summit, go to Sanderson's website and read ALL of their fitment notes for those headers.
chrysler 360 - Page 2 of 2 - Sanderson Headers
 
3404spdfish said:
does anybody know why Sanderson headers DD9-P sold by Summit do fit a 65 barracuda with a 360in it now, its was a 273 car. i am just curious before i buy them.
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Just note:
For Automatic Transmission applications ONLY!
 
man, i apologize, summit web site says they dont fit a 65 barracuda except the 273, this car was a factory 273 but it now has a 360
 
3404spdfish said:
man, i apologize, summit web site says they dont fit a 65 barracuda except the 273, this car was a factory 273 but it now has a 360
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Like I said, go directly to Sanderson's site and review the specs for the DD9 series headers. I don't know what Summit is thinking.
Right from Sanderson:
1745613315663.png

1745613435051.png

1745613485874.png
 
Unless there is a mismatch of the exhaust ports 360 vs 273, they should fit fine. Like any header install in an early A, you may have to loosen the motor mounts and do the "Wiggle till you giggle" thing until you get it sitting in the sweet spot.
 

ok thanks for all the info, they are on the way, i guess for some reason if they don't fit i will have more wall art until they are needed for a different project lol. i will post pictures either way
 
They’ll fit, just be prepared to do some port clean up at the header flange.

They use thick metal/high quality material but the port shape needs to be better at the flange.
 
Left header fits great, however the right one is a no go i have to put steering column back in before I figure out how to get engine over to the left. I hope for an inch max .

20250614_100545.jpg
 
3404spdfish said:
Left header fits great, however the right one is a no go i have to put steering column back in before I figure out how to get engine over to the left. I hope for an inch max .

View attachment 1716418101
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You may not get too much more clearance passenger side.
You can shift it by loosening all the mount to engine bolts, use a big bar or jack to shift as best possible. Then tighten the bolts .
Here's where the engine should be.
Shorties?
Good luck, cheers

Screenshot_20250614-185836.png
 
With steering column in the factory universal just squeeks by header pretty sure I can't even put header wrap on the headers

20250615_171345.jpg
 
If you were using a power steering to manual steering adapter it wouldn't even work
 
No it is all factory manual steering parts other than headers I changer to a LA 360 over the 273 and right motor mount is factory and left motor mount is from a 76 dodge truck the engine sits level so I will check measurements from the chart.

20250611_165015.jpg


20250611_165027.jpg
 
They say that more than likely because it has small 273/318 port windows ..
"1 1/2 Primary tube"
Thats really small.
Then the other guy goes on to say yoy need to open up the ports at the flange..
Which adds up to the 1st line in the post.
 
Just a quick look, engine height is good at 4.3/4. now side to side i have a difference of 1 7/8. Crank does sit offset to the right but it's more than 5/8 of an inch
 
I have shimmed the inboard steering box bolts with a flat washer each, angles the box/u-joint away from tube.
Nec to loosen steering column at firewall base (3 bolts thru floor) to get a little room.
Then loosen trans mount bolts, and shift it over.
Then, there are ratchet straps . . .
 
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Inertia said:
In the old days of $99 headers, warped flanges, hand welded, a bfhammer was indeed a nec tool, what a ****-show.

The new headers are sooo much better, flanges straight, sealing surface true.
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yup I had to straighten out dents in the engine bay of my swinger when I did the body work...
 
3404spdfish said:
Left header fits great, however the right one is a no go i have to put steering column back in before I figure out how to get engine over to the left. I hope for an inch max .

View attachment 1716418101
Click to expand...
Looks like it's hitting the inner fender where it bulges out to clear the UCA adjusting cam. Had the same problem when I ran early 340 manifolds in my 65 Barracuda. I used a BFH on the bulge to get clearance, but you can't beat it in very far at all because of the cam right behind it. Be easier with headers, because you can use the BFH on the offending header tube instead of on the freshly painted inner fender. That's what I would do, and I would be surprised if you can get in inch of clearance any other way, and maybe not even with that. I think I had maybe a quarter inch clearance. And that seemed to be enough, although I never was 100% comfortable with it. (Have TTI's now, and they clear fine.)

Frieburger and Dulcich did dyno testing a while back and found out you could beat the crap out of headers without losing horsepower. On a 560 hp motor.
 
Okwell just S and G I raised the engine to the 67-76 specs of 5 1/4 i get 1/4 per side. I still might get out the BFH. But before I get to excited I better find carb and air cleaner and make sure the other side clear hood.

20250616_185338.jpg
 
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