LS Swap headers

[BLACK DEATH]

So dynatechs are a no go then?
I have the hooker swap kit, but haven't bought headers yet.
Local guy has dynatechs for sale but if they hang low & I want to lower the car an inch or two in the future, I don't want to screw myself. But then lowering may not happen either anytime soon.

[Rod]

For a variety of reasons that involve physics, it turns out that long tube headers do the best job building horsepower and torque from mid-to-high RPMs. These are great for high-revving machines and Drag racing track terrors, but they do sacrifice some of the low-RPM power that most drivers depend on.

On the other side of the coin, shorty headers deliver more power horsepower and torque from idle to the mid-RPM range. This makes shorty headers perfect for your daily commute or hauling your boat up a hill.

Also note that sometimes short tubes can be easier to install and can add ground clearance

[jlcustomz]

Rod, not to be arguing with anyone here, but that's pretty much the opposite of what I've read on headers over the years, particularly for LS engines which most say go long or go home.

Of course I don't own a dyno to confirm that, but I did get knowledged design help on a set of long tube tri-y headers which I haven't had time to test fit & complete in order to butt dyno test against my crappy little short/mid length headers.

Engine to frame clearance & ground clearance usually always is more of an issue with long tubes, but if you do build custom fit there is a such thing as an inline 4 tube collector for ground clearance as an option. By the way, some dragsters these days are using tri-y headers, such as specified by Burns Stainless, which defy conventional design info we may have heard over the years.

[68sixspeed]

I will also try to add some pics to this thread when I can find them, I ended up staying with the flowmaster headers. Once I got the motor angle right by raising the back of the transmision the fit was good. Close on the steering box, but hey they all are. More ground clearance than the Kooks on my other car or the Doug's posted here. Pretty good quality for $650 coated stainless, including the collectors with the o2 bungs and extensions.

[oldstv]

It looks like most of these posts are dealing with the Camaro. Can anyone add advice from their experance on a 66 Chevelle? I don't mind using shorty headers if that will help with clearance but would rather go long if i have a choice.

[Toddoky]

It looks like most of these posts are dealing with the Camaro. Can anyone add advice from their experance on a 66 Chevelle? I don't mind using shorty headers if that will help with clearance but would rather go long if i have a choice.

Oldstv, I don't know if it will be useful to you or not, but I'm currently working on the development of the Hooker 1964-67 A-body LS swap system, which will include long-tube and mid-length headers as part of the effort. What engine mounts and transmission are you using in your swap?

[oldstv]

Oldstv, I don't know if it will be useful to you or not, but I'm currently working on the development of the Hooker 1964-67 A-body LS swap system, which will include long-tube and mid-length headers as part of the effort. What engine mounts and transmission are you using in your swap?

Todd, I'm not sure, a shop in central fl is doing the swap for me. I wanted to wait for the system that you are currently working on to start this project but they had an unexpected opening in their schedule so I go in line. If you have any suggestions please pass them along.

[Toddoky]

Todd, I'm not sure, a shop in central fl is doing the swap for me. I wanted to wait for the system that you are currently working on to start this project but they had an unexpected opening in their schedule so I go in line. If you have any suggestions please pass them along.

Being that you're dealing with scheduling time constraints and the fact that I don't know any of the engine/trans/component details of your swap or your end goal, my recommendations will be of little use to you at this stage. Before you worry about headers, I would just be sure to ask the shop how they plan to deal with the two common issues that are related to the 64-67 A-body LS swap application, i.e. the clearance issues with the oil pan/tie rod ends and the difficulty of obtaining optimized U-joint working angles. If they are cutting your floor open then these become less of an issue, but if they are not, I would want to know every detail about how they are performing the swap for you so you don't end up with a non-optimized set-up that you'll have regrets over.

[oldstv]

Todd, it is a 66 using a crate ls3 and a 4l60e trans. I assume they would use the new Holley -2 pan but I don't know about everything else?

[TANKMASTERJ]

I really want to use kooks mid length on my 67 F body LS7 swap. Anyone running them?

[TANKMASTERJ]

Part #29101400 kooks to be exact