250 header install question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**slepysal** · 05-15-2016, 01:22 AM

I picked up some Langdon headers of Craigslist.
Im hoping to install them soon and get rid of my old long tube headers.
My question is to those who have installed the Langdons before.
Is there anything that I should look for when I go to install them?
Can This be done by myself,or will I need an extra set of hands?
Thanks in advance

geezer#99 · 05-15-2016, 09:25 AM

Mornin' Sal!!!
A couple tips for ya'!!
The locating dowels on each end of the head should be pulled out and the holes tapped for a threaded stud. Better sealing that way and easier to install.
The washers used on the other studs need to be matched to each joint between the header flange and the intake flange. You might need to do a little grinding on them so they sit flat and make equal contact on both flanges.

**slepysal** · 05-15-2016, 10:55 AM

outstanding!! thanks

T2vigil · 05-15-2016, 07:44 PM

What Geezer said is 100% correct. I also uses Studs at every location. Makes the alignment so much easier. Take your time with the grinding and torqueing. When you are happy with the contact area tighten slowly. After it is running re-torque a couple of more times. Makes for a long term seal.

**slepysal** · 05-16-2016, 10:51 AM

Thanks to you both.

05-15-2016, 01:22 AM	#1
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	250 header install question I picked up some Langdon headers of Craigslist. Im hoping to install them soon and get rid of my old long tube headers. My question is to those who have installed the Langdons before. Is there anything that I should look for when I go to install them? Can This be done by myself,or will I need an extra set of hands? Thanks in advance __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "

05-15-2016, 09:25 AM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,595	Re: 250 header install question Mornin' Sal!!! A couple tips for ya'!! The locating dowels on each end of the head should be pulled out and the holes tapped for a threaded stud. Better sealing that way and easier to install. The washers used on the other studs need to be matched to each joint between the header flange and the intake flange. You might need to do a little grinding on them so they sit flat and make equal contact on both flanges.

05-15-2016, 10:55 AM	#3
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: 250 header install question outstanding!! thanks __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "

05-15-2016, 07:44 PM	#4
T2vigil Registered User Join Date: Jan 2010 Location: Evensville, TN Posts: 236	Re: 250 header install question What Geezer said is 100% correct. I also uses Studs at every location. Makes the alignment so much easier. Take your time with the grinding and torqueing. When you are happy with the contact area tighten slowly. After it is running re-torque a couple of more times. Makes for a long term seal.

05-16-2016, 10:51 AM	#5
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: 250 header install question Thanks to you both. __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "



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