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440 headers do not sit flush

mike rotch

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I got long tube headers for my 440 and noticed there is a lip on the cylinder head that is not allowing them to sit flush on the head. Is there a good way to get around this or just grind down the head or top lip of the headers to make it fit? Is this an issue anyone else has ran into?
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Pull the header off and trim the flange down on the header.... What heads are those? never seen a step like that..

Or, use it as an excuse for buying a set of aluminum heads... :lol:
 
Pull the header off and trim the flange down on the header.... What heads are those? never seen a step like that..

Or, use it as an excuse for buying a set of aluminum heads... :lol:
....or use about five gaskets. :p
 
Pull the header off and trim the flange down on the header.... What heads are those? never seen a step like that..

Or, use it as an excuse for buying a set of aluminum heads... :lol:
I’m not sure what heads they are I took a picture of the numbers on them but don’t know if they’re really any good or not as far as performance. They’ve got the numbers 4008457 stamped into them though. If I had to guess they’re probably truck or motorhome heads considering it had a passenger side exit water pump housing on it
 
I’m not sure what heads they are I took a picture of the numbers on them but don’t know if they’re really any good or not as far as performance. They’ve got the numbers 4008457 stamped into them though. If I had to guess they’re probably truck or motorhome heads considering it had a passenger side exit water pump housing on it
My new 1975 D2500 440 had the same step. I used 2 gaskets at the time to seal the header flanges.
Mike
 
Casting numbers are hard to read sometimes. Could be 452 heads. I have seen pictures of them with that lip. They flow as good as any non maxi stock heads, and they have hardened seats.
 
Agree with Wild. "Adjust" the headers. Just grind a bevel that clears the step.
Might have to trim the header gaskets too.
 
Casting numbers are hard to read sometimes. Could be 452 heads. I have seen pictures of them with that lip. They flow as good as any non maxi stock heads, and they have hardened seats.
Yes I took another look and they are indeed 452s.
 
I got long tube headers for my 440 and noticed there is a lip on the cylinder head that is not allowing them to sit flush on the head. Is there a good way to get around this or just grind down the head or top lip of the headers to make it fit? Is this an issue anyone else has ran into? View attachment 1636348

Did you get them to fit? Had to bevel the flange on my Doug's. I'm using the 452 heads also.
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LOL... I remember having to grind that top flange 40 years ago on my Challenger. Hooker super comps on a 400. Crazy how that is this like that !
 
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