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Topic: Frame Work

in Forum: C3 General Discussion


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Frame Work (1/14)
 2/21/23 7:36pm
Voler
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Joined: 2/19/2023
Posts: 5

Greetings all. Im new to the sight. Im looking for technical information on Frame of a 71. I have the typical diagram with a few of the general specs. What im looking for is specifics like cross measurements for the front horn extensions I sure this car has been hit a time or two. It was a complete basket case. I have it down to the frame and I want to ensure that its straight before I do anything else. Some of the body mounting bracketry looks tweaked. Im looking for a way to determine what is straight and whats bent. Nothing is major out of shape But I can tell from side to side that the front corner mounts are no longer mirror images, The bend is so slight that it wouldn't be noticeable without something to compare it to. any help pointing me in the right direction to ensure I have straight parts is appreciated. Thank you.

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Re: Frame Work (2/14)
 2/21/23 7:51pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2376

The A.I.M. for that year is a VERY Good place to start. 



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Re: Frame Work (3/14)
 2/21/23 8:29pm
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 862

Welcome to the forum. All I can offer is the Factory Service Manual has a few frame dimensions in it. You might check with a Chevrolet body shop to see if they can provide any assistance.



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1973 L-82 4 spd

Re: Frame Work (4/14)
 2/22/23 10:56am
F4GaryGold Member
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Grapevine, TX - USA

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1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1399

This is from my 72 factory service manual.  Should be the same.

 



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Re: Frame Work (5/14)
 2/22/23 2:28pm
Voler
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Posts: 5

Not sure what A.I.M is lol did a search and came up with nothing. can you enlighten me. thank you

Re: Frame Work (6/14)
 2/22/23 2:37pm
Voler
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Joined: 2/19/2023
Posts: 5

This is the diagram I have. Perhaps Im getting in to the weeds? was thinking some thinking that measured out control arm mounting points compared to each other and trailing arm mounting points to ensure everything is where it belongs. but thank you!

Re: Frame Work (7/14)
 2/22/23 3:23pm
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 862

The AIM is the factory work instructions on building the car.

I think if you measured the dimensions in the diagram and check the squareness of the frame by measuring diagonally to the body mounting points then you should have a pretty good idea of how straight the frame is.



|UPDATED|2/22/2023 1:23:56 PM (AZT)|/UPDATED|


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1973 L-82 4 spd

Re: Frame Work (8/14)
 2/22/23 4:12pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2376

SORRY my Friend.  "A" assembly, "I" instruction  "M" manual.  It has a multitude of information on getting your ride in correct shape. It does NOT tell you the sequence in which it is put together. 



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Re: Frame Work (9/14)
 2/22/23 11:57pm
Voler
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Thank you, Gentlemen. I now know the frame is 1/2" to 1 " out of square. seems to be damaged just behind the driver's motor mount down to where it straightens out for the rockers. Its sad this is a number matching car, Frame, engine, and Birdcage all still together, trans and diff are marked correctly for the date. Not sure what to do, straighten the frame is beyond my ability. if it wasn't numbers matching, I would just get another frame, but I hate to do that on this. Any Ideas???? would even consider swapping project with some one more capable and wants numbers matching car. Suggestions welcome and thank you !

 

Re: Frame Work (10/14)
 2/23/23 12:16am
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 862

Since it sounds like you're down to a bare frame, I would think a body shop that has frame straightening capability could do that. Not sure how much it would cost however.

I guess you could  weigh the cost of straightening it versus the cost of a replacement frame.



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1973 L-82 4 spd

Re: Frame Work (11/14)
 2/23/23 7:39am
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2376

My opinion, "I" would go the route of having a Professional look at it, and let them do the fine tuning. Not sure, but a half inch may not make a big difference. The alignment shop may be able to compensate for it once you get it all together. Are there stress marks where it possibly could be bent? 



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Re: Frame Work (12/14)
 2/23/23 2:16pm
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1399

Voler said:

Thank you, Gentlemen. I now know the frame is 1/2" to 1 " out of square. seems to be damaged just behind the driver's motor mount down to where it straightens out for the rockers. Its sad this is a number matching car, Frame, engine, and Birdcage all still together, trans and diff are marked correctly for the date. Not sure what to do, straighten the frame is beyond my ability. if it wasn't numbers matching, I would just get another frame, but I hate to do that on this. Any Ideas???? would even consider swapping project with some one more capable and wants numbers matching car. Suggestions welcome and thank you !

 


Where do you live?



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Re: Frame Work (13/14)
 3/19/23 12:48pm
Voler
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Joined: 2/19/2023
Posts: 5

I live In Dover Tennessee about an hour northwest of Nashville.

 



|UPDATED|3/19/2023 10:48:34 AM (AZT)|/UPDATED|
Re: Frame Work (14/14)
 3/19/23 1:26pm
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1399

If you put that in your profile, the rest of us can see it and maybe have a recommendation. 



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