big block headers with LS flange - The 1947 - Present Chevrolet & GMC Truck Message Board Network

terrylgreenjr · 03-30-2012, 10:16 AM

I'm sure someone has done it already but I'm going to try it myself. I tried some block hugger headers and I was not satisfied with the fit, and I'm tring not to spend a ton of money. I've got lots of time so I picked up a set of 1 7/8 big block headers and I'm going to cut them up and put the LS flanges on. If anyone has any pointers of threads for me to reference I'd love the help
Thanks

gringoloco · 03-30-2012, 10:29 AM

Check out LS1tech. I've seen a few sets done over there. You will need to tweak a few primaries, as the exhaust port spacing is different between the two engine families. What headers are you using? I've thought about doing this with a set of 67-72 Chevelle big block headers (known to fit our trucks well), which can be had for $150 or so, then flanges for another $80. Add a little time and you have a nice set of big tube headers on the cheap. F*rd Mustang headers have nearly identical port spacing, and can be had cheap, but I'm unsure how they would otherwise fit the truck...

Good luck, and post some pics when you get started

terrylgreenjr · 03-30-2012, 10:51 AM

I'm starting with cheap Flo Tech headers $135.00 They fit really well since they are for the K5. Im taking the gasket to a shop that has a waterjet machine to get the flanges made locally. It should be fun

68Stepbed · 03-30-2012, 12:20 PM

Actually SBF headers are the exact same spacing. Problem is finding SBF headers that fit our trucks.

gringoloco · 03-30-2012, 01:06 PM

79-93 5.0 headers LOOK like they would fit well, but you never know 'til you mock them up...

mac72 · 03-30-2012, 01:31 PM

chk. this thread , he never finished them though
http://67-72chevytrucks.com/vboard/s...d.php?t=415065

terrylgreenjr · 03-30-2012, 05:06 PM

It looks like he got close with his header build Lots of info there for sure

mac72 · 04-03-2012, 02:21 PM

Iwas hoping he'd finish them ,good luck

03-30-2012, 10:16 AM	#1
terrylgreenjr Registered User Join Date: Jul 2011 Location: Dallas, TX Posts: 183	big block headers with LS flange I'm sure someone has done it already but I'm going to try it myself. I tried some block hugger headers and I was not satisfied with the fit, and I'm tring not to spend a ton of money. I've got lots of time so I picked up a set of 1 7/8 big block headers and I'm going to cut them up and put the LS flanges on. If anyone has any pointers of threads for me to reference I'd love the help Thanks

03-30-2012, 10:29 AM	#2
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,920	Re: big block headers with LS flange Check out LS1tech. I've seen a few sets done over there. You will need to tweak a few primaries, as the exhaust port spacing is different between the two engine families. What headers are you using? I've thought about doing this with a set of 67-72 Chevelle big block headers (known to fit our trucks well), which can be had for $150 or so, then flanges for another $80. Add a little time and you have a nice set of big tube headers on the cheap. Frd Mustang headers have nearly identical port spacing, and can be had cheap, but I'm unsure how they would otherwise fit the truck... Good luck, and post some pics when you get started __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide* How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

03-30-2012, 10:51 AM	#3
terrylgreenjr Registered User Join Date: Jul 2011 Location: Dallas, TX Posts: 183	Re: big block headers with LS flange I'm starting with cheap Flo Tech headers $135.00 They fit really well since they are for the K5. Im taking the gasket to a shop that has a waterjet machine to get the flanges made locally. It should be fun

03-30-2012, 12:20 PM	#4
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: big block headers with LS flange Actually SBF headers are the exact same spacing. Problem is finding SBF headers that fit our trucks. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

03-30-2012, 01:06 PM	#5
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,920	Re: big block headers with LS flange 79-93 5.0 headers LOOK like they would fit well, but you never know 'til you mock them up... __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

03-30-2012, 01:31 PM	#6
mac72 Registered User Join Date: Dec 2008 Location: port charlotte,florida Posts: 384	Re: big block headers with LS flange chk. this thread , he never finished them though http://67-72chevytrucks.com/vboard/s...d.php?t=415065

03-30-2012, 05:06 PM	#7
terrylgreenjr Registered User Join Date: Jul 2011 Location: Dallas, TX Posts: 183	Re: big block headers with LS flange It looks like he got close with his header build Lots of info there for sure

04-03-2012, 02:21 PM	#8
mac72 Registered User Join Date: Dec 2008 Location: port charlotte,florida Posts: 384	Re: big block headers with LS flange Iwas hoping he'd finish them ,good luck



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