Well it is officially time to take my baby off the road for the winter.  Today the weather turned nasty.

If your car is an automatic, you can swap the trans crossmember for an earlier one that does have the holes. Imma thinking they still had the dual holes in the crossmembers until '78.

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Joel Adams
C3VR Lifetime Member #56    
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

My 79 has dual holes but I have a manual trans. I just bought a Pypes dual stainless x pipe exhaust system on ebay, they recomended one of these double hump crossmembers for your year, i'd be cool if you can pick up a stock one, then it would look like it belonged on the frame. I've seen the shorty cats around, I think Jegs? I got a screaming deal off of ebay under 500, but they said it was a one time promotional auction. I can update you some pics of the install when it's done. Are you going to run hedders as well?

79rebuild2007-11-30 23:14:23

I am also changing engine and tranny on my 82. I'm leaning toward the ZZ383 in front of a Tremec 5. Keisler sends a double hump X member with the kit.

[QUOTE=79rebuild]

My 79 has dual holes but I have a manual trans.[/QUOTE]

Yes...but...can you unbolt it from the frame?

The auto cars had removable trans xmembers...the four-spds were welded.

I don't know when they stopped using the dual hole xmembers...78 was just a guess.

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

I checked the Mid America catalogue (www.mamotorworks.com). They have a True Dual Exhaust system made for "80 - '82s. No crossmember swap necessary. This system does not address the issue of cats, though.

[QUOTE=Adams' Apple] [QUOTE=79rebuild]

My 79 has dual holes but I have a manual trans.[/QUOTE]

Yes...but...can you unbolt it from the frame?

The auto cars had removable trans xmembers...the four-spds were welded.

I don't know when they stopped using the dual hole xmembers...78 was just a guess.[/QUOTE]

I had a true dual system bent up for the '81. First I tried the '80-'82 true dual system from Mid America. Nothing lined up. Had to go to a muffler shop and have the pipes tweaked. I junked the system after unsuccessfully trying to adapt full length headers.

Sarge812007-12-01 16:31:41

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GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.

Martin, I would have to say that looks like a pretty good standard to follow for the dual exhaust set up, very nice Darryl! What kind of cat's are those?

Amazing feedback from everyone.  I really appreciate your help.  Can the crossmember be unbolted without having to lift the body off the frame?  If so that sounds like the way to go.  From the picture of the 81 exhaust it is hard to tell if the crossmember was replaced though.  If it was not replaced then why bother with the crossmember because it looks really clean.  I guess I am just a little concerned with the clearance to the ground.

[QUOTE=79rebuild]Martin, I would have to say that looks like a pretty good standard to follow for the dual exhaust set up, very nice Darryl! What kind of cat's are those? [/QUOTE]

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GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.

  This is all news to Me. I always thought that the Dual Exhaust X member Died when the Cat Converter came in in 1975. I had no Idea that the 80 was the first Year of the revised single  Exhaust  X member. I'm Curious if all the 80-81's have bolt in X members regaurdless of Transmission?  Richard.......

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