BAD-L88

My 1969 was not born with sidepipes. I am interested in adding them.

Is it possible to install them without doing any permanent modification? (drilling holes in particular) Do they just bolt on to existing holes in the frame?

If so is it possible to do this with original style sidepipes or do I have to use after market ones?

Sam question for headers to go with these sidepipes. Will they install without permanently altering anything?

I am interested in always being able to convert the car back to stock even if it takes time.

Thanks

Binnie77

The original style side pipes bolt to existing holes. The original style covers use the same holes as the original rocker moldings. You do have to cut a notch :sad: out the bottom lip of the front fenders to allow the front of the covers to wrap in. Barry's 70LT1 has the original covers with headers as well so he can no doubt shed further light on any other complications.


[Modified by Binnie77, 8:52 AM 11/26/2001]

Barry's70LT1

Hi...
As Binnie said I do have the factory '69 pipes on mine. I installed them in
1972. Also, as Binnie mentioned, you do need to trim a bit of fibreglass
from the lip of the front fender. This is from behind the door sill, so it
will never show, even if you convert back to regular exhaust.
The removal of the fibreglass is a factory procedure. It is documented in the
Assembly Manual.
There are existing holes in the frame for the muffler attachment.
Binnie's '77 had the holes.

The only hole that I can't remember is the one for the front end of the covers.
I may have had to drill that in the frame. It's been too long.

I also have headers. This is my third set. The first, 1972 were Thrush
nickel plated, "exit to stock side pipes".

The last two sets were Headman ? (Heddman) ?. They are made to use with
stock '69 sidepipes. No clearance problems. No "S" pipes.
If you are interested I can take some pictures and post them.

Bottom line, "No Permanent Modifications Required". (Other than the fibreglass trim)

I hope this info helps. If you need more, just let me know.

Barry

MELVIN

REMINDER: YOU WILL ALSO HAVE EMPTY HOLES IN THE REAR WHERE YOUR STOCK EXH IS NOW WHEN YOU INSTALL SIDEPIPES

BAD-L88

Thanks guys,

I can't wait to get up to them. Sounds like I will be doing it. I am checking the asssembly manual as soon as I get offline.

As for the holes in the back, I have other plans for them. Either rear guns, smoke machines to throw off people in pursuit, or marble dumpers to cover the road behind me with marbles. Or maybe just a couple of falme throwers back there. We'll see.

woodworkr

Barry,
What Heddman headers did you use? Were they the shortie type which look to be the same size as the origional horns, or did they collect under the car. I want to put headers on my 76 but I don't think that I have the ground clearence for any type of header that collects under the car. The shorties that I have looked at all say "may not fit cars with stock crossmenber. " Most are telling me they are for street rod applications. Do you know of a header that will fit a 350 small block the way that I have described?
Thanks for the help,
JoeB

Barry's70LT1

woodworkr.....
I forget the part number for the header, however they are like a conventional
header. The difference is that they don't point to the rear of the car, they
point toward the side pipes.
They are a bit shorter than conventional headers, but still have a standard
3" collector. Ground clearance has not been an issue.
Your '76 normally sits higher than a '70, unless you have greatly lowered
it. Your ground clearance should even be better.
I have had these type headers on since 1972. Haven't hit them yet.
I attached a picture showing the top view. (They need paint)
If you are interested I can take some bottom views.
I'll try to find the part number.
Barry

Jughead

Barry, do the headers bolt to the side pipes or is welding required?
If they're bolted, I'd be interested in the part numbers too.
Len

Barry's70LT1

Len..
As with conventional headers, you use the standard/typical collector welded
to the existing pipe.
I replaced the stock GM 1-3/4" pipe with 2-1/4" up to the stock muffler.
I went to a muffler shop and had them make the piece of pipe. (Vette stayed
home). You only require one bend, approx 86 degrees. Just take the old
pipe with you.
I had the input end of the new pipe "stretched" so it would slip over the
collector adapter. I welded it, you could clamp it.
At the muffler end, I left about 2" of the 1-3/4" pipe and had them stretch the
size so the new 2-1/4" would fit inside. I also welded, you could clamp.

The reason for making the pipes fit into each other is so your length
measurements do not need to be critical and for strength. Leave them a bit
long and trim to fit when you get home.
Yes this does take some time to do, however you are doing something that
will be trouble free for 10 years min.

Barry

Stingy74

I looked into this awhile back as well...Here are the Hedman part numbers:

68280
68281 (same as above but retains emissions stuff)

I called Jegs and they quoted $99.00 American dollars. They are a 1 5/8 primary tube header with 3" collector. Also, those are for a small block. They also have them for a big block.