TA shorty header clearance

Discussion in 'Wrenchin' Secrets' started by IlliniGSX, Nov 27, 2016.

  1. IlliniGSX

    IlliniGSX GSX #401

    Hello All,
    I am installing my first set of headers. They are on a 455 in a GS. They are TA shorty headers and they hit the steering shaft and frame pretty hard. To gain clearance I am going to have to dent them about 1\2 inch. Is this a normal part of the process?
    Thanks Jim:pray:
     
  2. Smokey15

    Smokey15 So old that I use AARP bolts.

    On my '67 Skylark, I had to dimple the driver side to clear upper control arm. I also have to install it as I lower the engine in. The passenger side will fit after the engine is set on the mounts.
     
    Gold GS likes this.
  3. David G

    David G de-modded....

    What model year? It makes a difference.
     
  4. IlliniGSX

    IlliniGSX GSX #401

    The car is actually a 1970 GSX. My concern was the amount I needed to dimple to achieve clearance. The scrapped black piece is the steering shaft.
    Thanks.

    20161127_105910.jpg
     
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

  6. Gallagher

    Gallagher Founders Club Member

    For the record. I would do the steering shaft mod mentioned in the other thread.
    [video=youtube;azPKIjxmmdU]https://www.youtube.com/watch?v=azPKIjxmmdU[/video]
     
  7. IlliniGSX

    IlliniGSX GSX #401

    Thanks for the responses, links and video. I do not want to alter the steering on my GSX so I will be going back with the stock exhaust manifolds. My engine is a strong Stage 1 build so the headers are not necessary just something I wanted.

    Thanks Again
    Jim
     
  8. David G

    David G de-modded....

    Porting your stock exh manifolds is another option then. Jim Rodgers offers ported manifolds.
     
    Gold GS likes this.
  9. IlliniGSX

    IlliniGSX GSX #401

    Ported stock manifolds is an option I have not considered. I will check into it. Thanks Jim
     
  10. BuickGSrules

    BuickGSrules Gold Level Contributor

    You will be pleased with the Work Jim does. I bought a set and could not feel any difference from headers.
     
  11. staged67gspwr

    staged67gspwr "The Black Widow"

    Jerry you fit 68-72 shorty headers in your 67? can we see some pics please?
     
  12. twmson

    twmson Well-Known Member

    I am having the the same problem with my 70' GS Stage 1. How much clearance is needed? I have maybe 1/8" after denting the header. How much can I "dent" the header without affecting the performance? There is a weld where I need to make the dent even larger, how likely is it that the weld could break?

    Thanks
     
  13. Gallagher

    Gallagher Founders Club Member

    Engine Masters did an episode called, Exhaust Header Bash! Testing Power Loss From Dents.
    I can't find it on Utube right now. The test proved that you have to beat them almost closed before you notice any real power losses.

    https://www.motortrendondemand.com/...ash-testing-power-loss-from-dents/0_ujj8a8mw/
     
    twmson and johnriv67 like this.
  14. Buickstaged

    Buickstaged The stable - 2204 Combined HP

    Guys - Larry’s message to read did not come through. I had the same issue on my 70 Stage 1, loosen the 5 or 6 bolts where the steering shaft goes through firewall. You can “slide” the steering column over about a 1/4”, maybe a touch more. That allows for the ta shorties to fit without bashing the headers. (Or at least it did on mine) This is a method from JW.. thx byron
     

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