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Old July 11th, 2006, 08:11 AM   #1
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Default Header question - full size

Recently had an issue with a header & need to replace the set. The headers I need to replace were on the small block in my 83 K5 Blazer when I purchased it. No idea of what brand they are & no stamps are visable. Picked up a set of Flowtech (Holly) headers for a blazer & installed the passenger side. The flang on the rear of the header ends up just in front of but extreamly close to the shackel which is rotated rearword as it sits. I'm concerned that with any suspension flex the shackel or shackel nut/bolt may get cought & bind on the header as it rotates forward.

I'm guessing many of you out there are running headers on a full size blazer or pick up. If so, what brand & has this clearence/interferance issue ever been a problem ? Do your headers come very close to the shackel - shackel nut/bolt?

The old set of headers did not hang down as low or go back as far so it was only the pipe that went buy the shackel & there was no interferance. No one at the local performance shop I use seems to know what brand the old headers are. Took a look for a set for a car & they are even longer.

Any thoughts or suggestions ?
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Old July 11th, 2006, 08:47 AM   #2
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It depends on the manufature of the header I have come across that issue with both small and big block headers. Solution turn the bolt around so the nut is on the outside. Obviously it will have to be done before the header.

You can still change springs and bushings with it that way just take a little more patience.
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Old July 16th, 2006, 03:17 PM   #3
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i have flowtecs on my 78 and the hit the driveshaft when the engine torques over. I'm not a real fan i think i would go higher end and pay for the quality dif.
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