Help! Chambered Exhaust

[Boydness]

I have searched the posts and have decided that I would like to add chambered exhaust to my '77 Auto. (Currently a 2-1-2)
My original plan was to purchase the kit from Mid-America and have it modified by a local shop. Except, now the kit is back-ordered.
I wanted to make some of the recommend mods and would like to throw some work towards the local exhaust guy in the small town.

From a trade awhile back, I have a set of
Hedman Hedders 68400 - Street Rod Block Hugger (Hedman 68400 - Hedman Hedders Street Rod Block Hugger and Tight Tubes Headers - JEGS

I am thinking about using them, instead of the original manifolds.
Any reason why I should not?


I thought that I should go with the glasspacks as suggested.
Should I also add the H-pipe?

If I am adding an H-pipe and glasspacks, should I even bother with a kit?
If not, what length of chambered sections should I order?

And, should I have the glasspacks bolted in, instead of welded, so that I can remove and replace (with replacements or straight pipe)?


From reading posts, I believe that I will need:
EX-341
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS Corvette Action Center Store

I did not find a 2.5" hanger, is there a 2.5" hanger?


Are there any other parts that I should order and take with me to the exhaust shop?

Does anyone have pics that represent what the pipes should look like when installed? I would like to take that with me to the shop.


And, the least amount of thought that I gave to this project was for the tips.
Which tips should I use? I would appreciate any recommendations.



Steven

 

[White75]

You're more apt to getting what you want with a custom setup
from your local guy for a reasonable price.
Install the headers and have the installer create an exhaust with an H-pipe if you want it and easy to remove flanges everywhere that you may want it (at headers to just before rear suspension (or frame cutouts) to make removal easier if you need to do some extra work underneath. all the extras will cost a bit extra but will offer a usable system for what you want.
Do some research and find you a good fabricator by talking to some of your local rodders, that way you don't end up with a hack job.
good luck!!!

I have searched the posts and have decided that I would like to add chambered exhaust to my '77 Auto. (Currently a 2-1-2)
My original plan was to purchase the kit from Mid-America and have it modified by a local shop. Except, now the kit is back-ordered.
I wanted to make some of the recommend mods and would like to throw some work towards the local exhaust guy in the small town.

From a trade awhile back, I have a set of
Hedman Hedders 68400 - Street Rod Block Hugger (Hedman 68400 - Hedman Hedders Street Rod Block Hugger and Tight Tubes Headers - JEGS

I am thinking about using them, instead of the original manifolds.
Any reason why I should not?


I thought that I should go with the glasspacks as suggested.
Should I also add the H-pipe?

If I am adding an H-pipe and glasspacks, should I even bother with a kit?
If not, what length of chambered sections should I order?

And, should I have the glasspacks bolted in, instead of welded, so that I can remove and replace (with replacements or straight pipe)?


From reading posts, I believe that I will need:
EX-341
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS Corvette Action Center Store

I did not find a 2.5" hanger, is there a 2.5" hanger?


Are there any other parts that I should order and take with me to the exhaust shop?

Does anyone have pics that represent what the pipes should look like when installed? I would like to take that with me to the shop.


And, the least amount of thought that I gave to this project was for the tips.
Which tips should I use? I would appreciate any recommendations.



Steven

 

[Boydness]

You're more apt to getting what you want with a custom setup
from your local guy for a reasonable price.
Install the headers and have the installer create an exhaust with an H-pipe if you want it and easy to remove flanges everywhere that you may want it (at headers to just before rear suspension (or frame cutouts) to make removal easier if you need to do some extra work underneath. all the extras will cost a bit extra but will offer a usable system for what you want.
Do some research and find you a good fabricator by talking to some of your local rodders, that way you don't end up with a hack job.
good luck!!!

The "local guy" is about 20 minutes from me and is the one that everyone has do their custom work on their hot rods.

I thought that I should take the hanger bracket and the chambered exhaust pieces, then let him work his magic.

My headers have a 2 1/2" collector.
Is there a 2 1/2" bracket?

EX-341
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS Corvette Action Center Store


What length of chambered exhaust is recommended?
I was thinking of going with Classic Chambered Powersticks, could I use their 12" resonators in place of the glasspacks?
Could any of the Cobrapack mufflers be used?


Steven

 

[White75]

Bring the bracket or see if the guy can fab a mount. The powersticks do sound good. I almost went with them but just did Flowmasters.

The "local guy" is about 20 minutes from me and is the one that everyone has do their custom work on their hot rods.

I thought that I should take the hanger bracket and the chambered exhaust pieces, then let him work his magic.

My headers have a 2 1/2" collector.
Is there a 2 1/2" bracket?

EX-341
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS
68-74 2" FRONT HANGER BRACKET W/AUTO TRANS Corvette Action Center Store


What length of chambered exhaust is recommended?
I was thinking of going with Classic Chambered Powersticks, could I use their 12" resonators in place of the glasspacks?
Could any of the Cobrapack mufflers be used?


Steven

 

[Boydness]

Bring the bracket or see if the guy can fab a mount. The powersticks do sound good. I almost went with them but just did Flowmasters.

Do you have a pic of your setup?

 

[Art Jett]

I'm running 3" stainless all the way from the headers back. I have 30" long chambered sections from Stainless works under the floorboards beside the trans. I don't have much ground clearance but I've also lowered the car about 2" from the F-41 suspension.

 

[Bob Chadwick]

I put on Dynomax ceramic headers and Flowmaster Delta 50's with 2 1/4" pipe. There are a bunch of pix on my web site but here are a couple.

 

[Curtis]

I am surprised you can get a shop to do custom exhaust work, like changing to dual exhaust and eliminating catachlysmic converters. I was told here that the shop could be fined big dollars for altering exhaust on my 76. some kind of EPA law violation. Anyway I bought the stuff and did it myself. Now my car is no longer saleable in California, oh darn.

 

[Bob Chadwick]

They wouldn't remove the single cat but were ultimately convinced to switch from one to two for a true dual exhaust. They didn't reduce their risk by doing so but that is their issue.

The volunteered to make "test" pipes for me to put in place of the cats while I was testing the car but I figured that since I paid for them, I may as well leave them in place.

 

[White75]

Do you have a pic of your setup?

Nah, just picture straight pipe with a few bends going back to a set of mufflers. No H-pipe either. My installer used the existing mounts and brackets as far as I can tell

 

[White75]

I am surprised you can get a shop to do custom exhaust work, like changing to dual exhaust and eliminating catachlysmic converters. I was told here that the shop could be fined big dollars for altering exhaust on my 76. some kind of EPA law violation. Anyway I bought the stuff and did it myself. Now my car is no longer saleable in California, oh darn.

Ours was an Alabama car that already had a Cat-delete mod so the shop wasn't removing the cats on ours when we got our exhaust put on so there was no risk from them.