Well I am to the exhaust portion of my install of a 6.0L in a stock front clip 1966 Chevy II. I need to order a set of header flanges and I was just wondering what brand of flanges do you guys get? I see that GM offers a header flange in 1 3/4 ( part #12480130 ), but I also noticed that patriot exhaust also offers a flange kit. They only thing that I don't get about patriots is they list the flange in three sizes 1 5/8 - 1 7/8 with the same part number. Has anyone used the patriot header flange before? Just checking out what options I have before I order.

Thanks,

Jared

 

I have an extra GM flange I can sell you for $25 plus shipping. It is brand new in the original box. If you need any measurements off of it to compare to the patriot flanges I can get those for you too.

 

I searched the GM flange and came up with some measurements, I believe they are 3/8ths thick and have a primary size of 1 3/4. Does that match the measurements of the GM flange that you have 76LQ9TA?

Thanks for the fast response,
Jared

 

http://www.speedwaymotors.com/p/6766...tml?itemNo=LS1

 

Wow those are only 5/16" thick. Thinnest I had seen before was 3/8".

 

sorry for the hi-jack but i feel like this is really relevant to the OP. what is a good source for header tubing?

 

Lowdeuce-

I'm getting ready to start the same swap, but in a 64 II. My biggest concern has been headers. I'm going to do a rack and pinion conversion to free up some space, and am hopeful that a set of headers from S&S Headers http://www.ssheaders.com/muscle.htm (#5207) might fit. I spoke to the tech guy there, and he indicated that they will several cars with R&P conversion, maybe even a stock front clip! He said that these headers really hug the block, so I've decided to order a set when I'm ready, and try them out. I was told if they are not dinged up, I can return them.

Not sure if you have done this conversion, but it may be worth a shot if you don't have to build headers.

-Jeff

 

I found a guy on theturbofoums.com to cut me out a set of 1/2" thick flanges for my turbo headers. $50 for the pair too, you cant beat that!

His screen name on there is "Yecker"

 

I modified my old fender well headers, I used only 2 new tubes, all the other tube are the pieces I cut off the old flanges. I used the GM flanges they're nice. Here's a pic of my junk.

 

Good to hear! I'm going to be doing much the same thing with my project, I sure wouldn't complain if you felt like posting a picture that focused on the flange...

 

Yeah This is the thread I have been waiting for ! I have a 67 chevy II I am doing an LS6 swap into with the stock clip on it as well , What oil pan did you guys use on your cars ?
my plans are the cut up my fenderwell headers like 63chevyII did. Can you post more pics I would love to see more

 

I didn't take a bunch of good pics. This headers are over 12 years old and really thin thats why I didn't grind the welds down. I recommend using new headers.

 

Stock clip car, run the GTO pan, it clears everything nicely......

Jack

 

Awesome
Thanks guys!

 

Has anyone looked into the 351W swap headers used on early mustangs, since the front clip is basically the same design as a Chevy II front end? I believe the deck height of a 351W is very similar to the deck height of an LS1. Might be another option for headers on a stock front clip.

Jared

 

I've got a pair of the GM flanges if anyone's interested.

 

if you use the stock clip, #2 & 4 cylinders need 90 degree tubes with 1 3/4" radius. The GTO oil pan works perfect. S & P has them cheap.

 

Kudos to you 63chevyll - it looks like you did a really nice job there... And that first picture you posted (that shows the thickness of the flange) is just what I was looking for - thank you! Good luck w/ the rest of the project.

Zedzag - I'd be interested in the pair you have, if I thought that shipping them to me (here in the US) wouldn't cost more than my simply buying them new... Here's a bump hoping that you get a quick sale.

 

Very nice job ! this is really going to help me alot , I will post picks of my 67 as I get going in the next couple weeks
Thanks for the pics and info , I can't wait to drive it again

 

well guys I tried to fit my Ls6 in the nova last night, my corvette batwing pan is definitelly not going to work! I need to find the GTO pan and you have suggested.

where can I find s &p