Hedman Header fitting problems
Thread Starter
3rd Gear
Joined: Aug 2007
Posts: 3
Likes: 0
Hedman Header fitting problems
I've got a 1977 Corvette with a big block, I purchased Hedman Header part number 68090, the engine has stock motor mounts, and aluminum
heads. The passenger side header went on fine, but the driver's side I'm
having a problem with it seems to interfer with the steering box. Has anyone got any suggestions, Thanks
heads. The passenger side header went on fine, but the driver's side I'm
having a problem with it seems to interfer with the steering box. Has anyone got any suggestions, Thanks
Le Mans Master
Joined: Nov 1999
Posts: 5,768
Likes: 3
From: San Diego CA
I've got a 1977 Corvette with a big block, I purchased Hedman Header part number 68090, the engine has stock motor mounts, and aluminum
heads. The passenger side header went on fine, but the driver's side I'm
having a problem with it seems to interfer with the steering box. Has anyone got any suggestions, Thanks
heads. The passenger side header went on fine, but the driver's side I'm
having a problem with it seems to interfer with the steering box. Has anyone got any suggestions, Thanks
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
Is it possible that your stock mounts are old and worn?
I'm running those same headers in my 80 and they dont touch the steering box, or anything else.
I just noticed that you mentioned aluminum heads. Most likely they have raised exhaust ports.
If so, its time to get out your torch and hammer to do some reshaping unless you want to try a different brand of headers.
I'm running those same headers in my 80 and they dont touch the steering box, or anything else.
I just noticed that you mentioned aluminum heads. Most likely they have raised exhaust ports.
If so, its time to get out your torch and hammer to do some reshaping unless you want to try a different brand of headers.
Drifting
Joined: Jul 2009
Posts: 1,532
Likes: 14
From: Dallas-Fort Worth TX
Yes, you will have fit issues on the driver side, against the steering box. This is based on aftermarket heads. I have the hedman ceramic coated model. Those who use stock type iron heads do not seem to have problems. Aftermarket aluminum heads, many have raised exhaust ports which is what causes the problem. I had the same problem. BFH fixed the problem. Did not like it but it had to be done.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
I've been considering aluminum heads for a while, but have been torn between the AFR exhaust port flow numbers and the Brodix exhaust port stock location.
Le Mans Master
Joined: Nov 1999
Posts: 5,768
Likes: 3
From: San Diego CA
I helped a friend fit Hooker supercomp headers to his 496 equipped nova with raised port heads, those raised ports caused all sorts of problems, we even had to dimple the headers for clearance from the engine block!!
Drifting
Joined: Jul 2009
Posts: 1,532
Likes: 14
From: Dallas-Fort Worth TX
Here is a pic next to my newly rebuilt steering box.
[IMG]
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Instructor
Joined: Jun 2011
Posts: 183
Likes: 1
From: Litchfield CT
block?
Is the block a passenger car block, or tall deck? Tall deck requires modifications.
Race Director
Joined: Jan 2007
Posts: 14,900
Likes: 3,327
From: NYC NY
I have GM iron oval port big block heads and Hedman Headers did not fit at all. For my car the issue was the passenger side. They did not clear the idler arm and the collector was aimed at the ground. For what it's worth the car has new motor mounts also. Keep in mind if you "ding" them you own them no matter what. There were several other fitment and quality issues with this pair of headers. Hedman tech line and customer service were no help at all. Once you have to start beating and rebending I think it's time to consider another brand. At one time Hedman Header fit was just about a sure thing but not so any more. Do a search in this forum using "Hedman" and you will find lots of reading. The older posts are very positive the newer posts not so.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
I have GM iron oval port big block heads and Hedman Headers did not fit at all. For my car the issue was the passenger side. They did not clear the idler arm and the collector was aimed at the ground. For what it's worth the car has new motor mounts also. Keep in mind if you "ding" them you own them no matter what. There were several other fitment and quality issues with this pair of headers. Hedman tech line and customer service were no help at all. Once you have to start beating and rebending I think it's time to consider another brand. At one time Hedman Header fit was just about a sure thing but not so any more. Do a search in this forum using "Hedman" and you will find lots of reading. The older posts are very positive the newer posts not so.
Your headers were side exit headers.
jbrowncowboy asked about part # 68090. Those are standard under car exiting headers.
