LS exhaust for 1st gen stock front clip - Chevy Nova Forum
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Old 18th-February-2011, 08:09 PM   #1
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LS exhaust for 1st gen stock front clip

I recently read a tech. article comparing the costs and installation recommendations for an LS motor versus a 1st generation SBC in a 66/67 Nova with a stock front clip. It recommended using the 03-09 Trailblazer exhaust manifolds because they hug the block and have rear dumps. Anyone tried them in a 1st or 2nd generation Nova?
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Old 18th-February-2011, 09:12 PM   #2
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From what I have read no production manifolds will fit a stock clip.You may be able to make something work if you were willing to notch the shock towers.CBR makes a nice set of headers but require the CBR rack and pinion conversion as well.A nice addition with a modern drive train upgrade.
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Old 18th-February-2011, 09:17 PM   #3
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these are stock manifolds for a 2006 trailblazer
325 (5.3)
2003-06 Envoy XL
2004-05 Envoy XUV
2005-06 Envoy (Denali)
2004-07 Rainier
2003-04 SSR
2006 Trailblazer
2003-06 Trailblazer EXT
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Old 18th-February-2011, 09:56 PM   #4
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I saw that article as well, I believe it is wrong. Unless you want to modify the passenger side shock tower I don't believe you will get a stock manifold in on that side
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Old 19th-February-2011, 01:56 PM   #5
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Thanks for the replies. When I read the article I had my doubts. The $125 price tag sounded much better than $900 for a set of headers. I probably would have sacrificed a little power for the difference in ****. The next time I get to a wrecking yard I will try to check out the trailblazer manifolds. Maybe an angle mill job will tuck them in a little tighter? Probably just wishful thinking.
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Old 19th-February-2011, 05:07 PM   #6
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I havent heard of anyone trying these manifold out yet. Would be interestiong to see if they would fit or what mod would be needed?
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Old 19th-February-2011, 09:22 PM   #7
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i did try a set of these and the place where they interfere is at the flanges, they have a larger flange and it hits the vertical plates where the front clip bolts on, i was going to try machining the header flange on a slight angle but it wasnt enough so i got a set off the bay ,( the ls1, ls6 shorty stainless headers,)these fit but still needed a light shave of these vertical plates,i will post pics as soon as i remember how to upload them
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Old 19th-February-2011, 09:29 PM   #8
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[IMG]http://[IMG]http://i1206.photobucket.com/albums/bb453/kryptonite1967/ls%20swap/tach006.jpg
[IMG]http://[/IMG] IMG]http://i1206.photobucket.com/albums/bb453/kryptonite1967/ls%20swap/tach005.jpg
[/IMG][IMG]http://i1206.photobucket.com/albums/bb453/kryptonite1967/ls%20swap/tach004.jpg
[IMG]http://i1206.photobucket.com/albums/bb453/kryptonite1967/ls%20swap/tach003.jpg
[IMG]http://i1206.photobucket.com/albums/bb453/kryptonite1967/ls%20swap/tach001-1.jpg

Last edited by Kryptonite; 22nd-February-2011 at 06:54 PM.
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Old 19th-February-2011, 09:32 PM   #9
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Red face

there are 5 pics if you scroll across, need to resize them again
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Old 21st-February-2011, 03:31 PM   #10
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Those pictures are great Kryptonite. My initial concern was shock tower interference on the stock clip - wasn't thinking about the vertical frame/body supports. I see you have a front clip - any thoughts or experience on the stock clip/trailblazer exhaust fitment. Also, couldn't tell how much radiator clearance you have. In your opinion, would moving the motor ahead an inch help? Lastly, the shortys you have look a little wide for a stock clip - your thoughts?

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Old 22nd-February-2011, 09:34 AM   #11
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Thought this thread was about "stock" frontends??????
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Old 22nd-February-2011, 04:01 PM   #12
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Quote:
Originally Posted by greasemonkeychef View Post
Thought this thread was about "stock" frontends??????
That mounting point is the same regardless of whether the car has a stock or aftermarket clip. Doesn't matter if the manifold will hit the shock tower or not.
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Old 22nd-February-2011, 04:02 PM   #13
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It started out about a stock front end. Hopefully, if it continues, it will focus on the stock front end. Even though the photos Kryptonite posted were in a clip, they were still very informative. I was hoping to avoid reinventing the wheel by pursuing the Trailblazer manifold when someone else has already been there. I was hoping to find a cost effective solution to the LS/stock front end issue. It's beginning to look like it's $1,000 or build your own.
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Old 22nd-February-2011, 04:47 PM   #14
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First off...Krypto, can you fix the pictures, you don't need to resize, just stack them on top of each other, not side by side......makes it almost painful to read this thread...

Secondly, I have thought about getting a set of Corvette exhaust, I think they are called the "tall" ones, look sorta like a ram horn, a little past center dump and have them angle milled. They are stainless, so you could cut the collector off, if it's in the way, and reclock, and weld it back on......don't remember the body style, C4 or C5 maybe with the LS motor.......I would suspect you wouldn't need to take more than a few thousand'ths (sp?) off the bottom side to get it to lean in toward the block....if someone hasn't tried this by the time I get to setting the motor in the wagon, I am going to try it. I wouldn't wait on me though, it's going to be a few months......

T,

Last edited by TomM; 22nd-February-2011 at 07:22 PM.
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Old 22nd-February-2011, 06:42 PM   #15
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how do i stack them??
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