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Header Question: windsor vs. Cleveland flange

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12K views 11 replies 6 participants last post by  Beoweolf  
#1 ·
Is anyone aware of an adapter that will allow use of cleveland style header flange to be bolted to windsor style (inline) exhaust bolt pattern?

I have seen three different bolt patterns on windsor heads...unless my memory is faulty.

the dual, inline pattern...which has the normal width and a second set of bolt holes, wider set...making a total of 4 bolt holes on each exhaust port.

then a set which has the rounder exhaust port with cleveland style bolt pattern (set on an axis) off the top and bottom of each port.

This is for a short deck (302) type block.

A while back there was a thread that mentioned the existance of a flange which uses counter sunk bolts to convert the bolt pattern from inline (W-type) to axis type (C-pattern). I need to confirm who makes them, P/N and a source, if possible.

The only marking on the headers is "J 302", I have a set of the early "J 302" heads, but the patterns don't match.

I'm guessing I could have the heads drilled for the pattern, but I am not real sure I wouldn't hit water or if the surface would be flat enough to seal correctly.

Some of you guys that have been around longer than a minute might be able to give a hint on this.
_________________
They that can give up essential liberty to obtain a little temporary safety
deserve neither liberty nor safety.
-- Benjamin Franklin

<font size=-1>[ This Message was edited by: Beoweolf on 2/9/05 8:18am ]</font>
 
#2 ·
You have to remember the angle of the exhaust side of the heads are different. The Cleveland is at a 90 deg. angle to the deck, while the Windsor is layed over some. Even if you find an adapter palte, the headers are going to fit in the car differently.
 
#4 ·
On 2005-02-08 20:34, allenman85 wrote:
Hooker makes the adapters. You can either search their website, this forum (it's been answered a bunch), or on Summit Racing.
I just (already) got off the phone with summit...no joy there. That's what prompted this message. Took 15 min. of talking to a brick wall to finally understand the phone guy was totally clueless. I had gone through their ctalog before calling, thought that maybe I had just missed the page or something.

I will take a walk through the hooker site to see if there is anything on-line. It's always Late by the time I get a break in the day, find enough time to be on the phone, to call back east.

I had thought I read a thread about thiree being an adapter a few weeks back, but had no luck finding it so far. I'm willing to give an "hearty att'ta boy" to any helpful directions.
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_________________
They that can give up essential liberty to obtain a little temporary safety
deserve neither liberty nor safety.
-- Benjamin Franklin

<font size=-1>[ This Message was edited by: Beoweolf on 2/9/05 8:45am ]</font>
 
#6 ·
On 2005-02-08 20:50, mavman wrote:
http://www.stahlheaders.com/

Call them, ask for either Judy or Jere. They sell them with their Windsor header kits. I believe they're 3/8" thick...might be wrong though.
I checked the site,...it's too late to give them a call tonight, so I'll give them and Hooker a hollar in the AM.
 
#7 ·
Well...ok, I'll do your dirty work. Here is the link on the Hooker page.... the last 4 items are what you want. You choose the exact app.
http://www.holley.com/HiOctn/ProdLine/Products/ES/ESHHA/Flange.html

If you peruse the Hooker catalog you'll see the application that includes an adapter flange with the headers. Those are the ones that convert the 2" across pattern to the diagonal pattern you're looking for.


They're instock at Summit: $114.69
Summit PN: HOK-11872HKR
 
#9 ·
On 2005-02-09 12:37, allenman85 wrote:
Well...ok, I'll do your dirty work. Here is the link on the Hooker page.... the last 4 items are what you want. You choose the exact app.
http://www.holley.com/HiOctn/ProdLine/Products/ES/ESHHA/Flange.html

If you peruse the Hooker catalog you'll see the application that includes an adapter flange with the headers. Those are the ones that convert the 2" across pattern to the diagonal pattern you're looking for.


They're instock at Summit: $114.69
Summit PN: HOK-11872HKR
Why thanks for the generous offer of help in finding the listed info...fortunately, or unfortunately(?)...I didn't see this until later.

As I had mentioned earlier, the "Dufuss" I got on the Tech line at Summit, couldn't find them in his catalog nor apparently when he asked a couple of others on his shift...he put me on hold a couple of times to ask.

I did call Hooker and left an e-mail requst for the info you generously...no strings attached ...provided. But, as I am in California, you east cost guys sure go to bed early, and only got the answering machine and directions to the web site. I also got a message back from White's Pit stop...another online header shop I e-mailed late last night.

Much obliged for the URL...
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#10 ·
On 2005-02-08 20:50, mavman wrote:
http://www.stahlheaders.com/

Call them, ask for either Judy or Jere. They sell them with their Windsor header kits. I believe they're 3/8" thick...might be wrong though.
Mav's right i got mine with my headers from stahl. Heres what it looks like. I also had to put them on the bridgeport to open them up to port size.


Image
 
#12 ·
Called Holley/Hooker(270-781-9741)... direct, finally got to talk to one of their techs. He mentioned that the centerline distance on the flange (was listed at 2.6. my headers measure out at a little under 2.5, about ~2.45. He was sure they wouldn't fit.
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After a few more questions, I asked if he had a part number for the gasket used int the flange kit (10861HKR). So just to cross reference, I intend to get a set of the gaskets and match them up with headers, see what gives in the real world.

Summit saya they have them, finally - after I gave them the P/N you guys provided, but has no pictures or clue. They agreed that iI talk directly to Holley/Hooker.

Stahl has them listed, but I wasn't real sure of what all was included...reading from the web listing wasn't real clear, so I sent an email for info. I'll also give them a call when I get a spare minute.

Thanks for the picture, that helps more than anything else...like they say, a picture is worth a 1000 words. Way too often, buying from P/N's and supposed applications get's tricky...that's how I got in this fix with the heads and headers not matching in the first place.

I'm getting there...thanks for the assist. Here's the Atta' boy!!!I promised...share it amongst yourselves, no fighting now.
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This has been a nagging problem for a few years, you guys solved it in a couple of days. That's a bunch more than a few dollars, in heads and headers sitting in the garage, that may finally have a use. I realize the heads are out of date, compared to the sewer pipes available today, but they are stil a decent little aluminum head and should work great in the right application.

_________________
They that can give up essential liberty to obtain a little temporary safety
deserve neither liberty nor safety.
-- Benjamin Franklin

<font size=-1>[ This Message was edited by: Beoweolf on 2/10/05 11:37pm ]</font>