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Old 03-17-2010, 06:41 AM
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Exhaust

I feel for you. My 76 chevy had the same problem with fit of the headers.
It's kind of a joke as the collectors point right at the crossmember.
I got around that with two flexible exhaust repair kit's. I bent them to go over the crossmember between the transfer case and then hooked the 2 1/2"
pipe on back. Every one said "oh, they'll rust out" but they have been on there since sept. 08 with no problems so far. Good enough for me as I don't have a fat wallet. Even if they do, it's been long enough that I can afford new kit's. This exhaust has been through 2 winters and a bunch of off road trips and mud bog's.

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Old 03-18-2010, 07:02 PM
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I ended up taking two 45 degree 2.5" pipes, cutting one short, and welding them together. This pointed the exhaust down and then back which i then welded a straight section of pipe onto and now i'm going out to clamp the mufflers on. I dont want to weld them on really but i suppose i could.
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Old 03-18-2010, 08:05 PM
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The trans crossmember from my donor truck (1979 C20 3+3 Camper Special)
wouldn't fit between the frame rails of my '66, but there was another truck (well, what was left of a C10 truck) in the compound that had a different c/member style.

The cab, engine, trans were all gone ... the only indicator of year range was the pickup box and the steering box ... which had SAE flare fittings. This means it was likely 81 or prior, for sure.

I can't remember what the other significant clues were, but I had somehow guesstimated it to be a 1976.

So here is the picture of the two c/member styles. The "73-80" one was missing one of the support brackets, which was a pretty easy find at the wreckers.

Click here for picture


I am using that now on my '66, and dual exhaust (straight pipe from header to turbo mufflers) fits fine.

Hope this helps.
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Old 03-18-2010, 08:12 PM
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Here's another picture of the installed crossmember and temporary exhaust system.
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Old 03-18-2010, 08:13 PM
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My crossmember is like the black one at the bottom of the pic. Bolts on the outside on the left and bots on the bottom on the right side. This is in a 79 C-10 pickup.

Now, a couple years ago I had a 78 suburban, also a C-10, that had the other style crossmember (top one in the pic).

Im not sure what the deciding factor is on what truck gets which crossmember. My 79 was originally a six cylinder with a 3 on the tree manual trans, and the 78 suburban had a 454 and a TH400.

Before i scrapped that suburban (after it was wrecked) I tried to get the crossmember out, but couldnt. It appeared that I would have to seperate the frame rails to get it out, which means i would have to do the same on this truck to get that crossmember in. A task I am not up to at the moment.
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Old 03-18-2010, 08:23 PM
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Quote:
Originally Posted by Torque454
My crossmember is like the black one at the bottom of the pic. Bolts on the outside on the left and bots on the bottom on the right side. This is in a 79 C-10 pickup.

Now, a couple years ago I had a 78 suburban, also a C-10, that had the other style crossmember (top one in the pic).

Im not sure what the deciding factor is on what truck gets which crossmember. My 79 was originally a six cylinder with a 3 on the tree manual trans, and the 78 suburban had a 454 and a TH400.

Before i scrapped that suburban (after it was wrecked) I tried to get the crossmember out, but couldnt. It appeared that I would have to seperate the frame rails to get it out, which means i would have to do the same on this truck to get that crossmember in. A task I am not up to at the moment.
Yeah, that "deciding factor" thing beats me too. Did the 'Burb have single or dual exhaust from the factory?

As far as "getting it out" goes ... I don't recall that being too hard.
You have to remove those "wing" braces first, so that you can lift one side to the top of the inside of the frame rail. After that, I think it just cleared the bottom edge and slipped out from below.

The tranny had already been pulled though, so I can imagine it would be a lot harder if it was in the way.
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Old 03-18-2010, 08:27 PM
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Quote:
Originally Posted by 66GMC
Yeah, that "deciding factor" thing beats me too. Did the 'Burb have single or dual exhaust from the factory?

As far as "getting it out" goes ... I don't recall that being too hard.
You have to remove those "wing" braces first, so that you can lift one side to the top of the inside of the frame rail. After that, I think it just cleared the bottom edge and slipped out from below.

The tranny had already been pulled though, so I can imagine it would be a lot harder if it was in the way.
It was dual exhaust, dont know if it was factory or not tho. Im sure that it probably was. I had the trans out when i tried to remove that crossmember. I might not have been able to get the bolt out that holds the wing onto the crossmember. That may have been the problem. I cant remember for sure, that was back in 06.
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Old 03-18-2010, 08:34 PM
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Quote:
Originally Posted by 66GMC
You have to remove those "wing" braces first
But I didn't put them back, on my '76 Blazer. Said I would after testing out the tranny I put in it, but just never seemed to find the time...
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Old 03-18-2010, 08:37 PM
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I didnt put them back in on my 72 when i had it apart. And i didnt reinstall the one wing that is supposed to be on this truck too.

I dont really see much need for them, especially on my truck with the crossmember that bolts to the side.

Last edited by Torque454; 03-18-2010 at 08:43 PM.
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