Thread: Headers for 69 chevelle?

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#5 mod complete.

You mentioned that you hoped to solve a problem of blowing out exhaust gaskets with your modification. I'd say that there's little chance of that problem being solved, looking at those flanges. Quality headers have 3/8" thick flanges to eliminate warping with heat and pressure, and cheaper headers have 5/16" or even 1/4" thick. Yours look to be more like 1/8" to 3/16" but it may be the camera angle fooling the eye.

#3 mod complete

'Tis the camera angle. They're 1/4"

FAIL.

You are a no- go at this station.

Report to your first- line supervisor for additional training.

#3 down tube is still too close to #5 plug.
Pulling it back off.

Good to see that you took on the challenge and got the outcome you were looking for; that's what this game is all about. I hope the flange problem does not recur, though, 1/4" flanges are pretty chancy, like Roger says; the first headers I had on my '59 had 1/4" flanges, and I was always fighting leaks. Put a set on with 3/8", and heavier tubes, and no more fussing around with them..

.

http://i1149.photobucket.com/albums/...psdnyywuxr.jpg
would these work?

Possibly.

I'll have it licked soon as I rework tube #3.

#3 completed again

Success. I would like to have brought #5 out another quarter inch, but it is good.

I'm also going to make booties for the wires using the heat wrap. That will give them an extra layer of heat protection.

do you run the plug wires over or under the headers?

More success!

Swapping the edelbrock 2601 air gap to the edelbrock 7101 performer got rid of my cold - start and mid - throttle issues. I might even try swapping the 600 edelbrock back to the 750 and see how it does.

This whole time it's been running the wrong plugs. It had the short - nosed plugs, needs the long - nosed.
I also found the dizzy cap contaminated with oil, probably from the rear breather cap. Since I have the PCV on that side, I plugged that breather. Cleaned the cap with contact cleaner and compressed air. New wires - #5&6 were fried.

Altogether, it's never run this smooth.

Kind of supports the old adage:

If you want it done right, do it yourself.

Jerry - both over and under, whichever provides the best protection to each wire.