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Old Mar 28, 2024 | 06:08 PM
  #21  
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How many know that until they came up with the rod fix, 68's had a special "L" bracket welded to the 68 only front bumper and there was a separate "L" bracket that connected to the nose fiberglass metal that the rod bolts to. Lou.
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Old Mar 30, 2024 | 03:53 PM
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Originally Posted by 69L88
I don’t doubt what @loup68 says about the brackets but you need to start with everything loosely, repeat loosely, installed as this is a big jigsaw puzzle to get everything properly aligned first, then slowly progressing through tightening everything up while carefully observing that no stress is induced. Never, ever, tighten any bolt until ALL bolts are installed.

I noticed that you have the “twist” brackets that connect the lower front metal reinforcement to the main bumper attachment holes so that’s good as they are an important part of the assembly. They are often missing as they are a PITA to fit in. Do you have the center support rod?

Getting everything to line up is proving very tricky!

Waiting in a new frame extension gasket to come in before we mess with it further.

The puzzle pieces are NOT lining up as pictured in the AiM. 😕
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Old Mar 31, 2024 | 02:01 PM
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Really struggling to know what we have and what is missing.


Can someone please post up some pictures of what this area should look like and what we are missing?



This is from below looking up at the very front. Do these 2 areas not have a piece of metal that connects?
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Old Mar 31, 2024 | 02:40 PM
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Nicole, you have the original, first design 68 front bumper and 68 "horse collar" central brace that I was talking about! Lou.
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Old Mar 31, 2024 | 02:51 PM
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I can't see that the front bumper has the welded on metal piece that the horse collar bolts to like in the above A.I.M. diagram. I do not see how the forward end of the rod would bolt up there. I made a rod for mine years ago and it fit, but I did not have your "L" bracket in the way. Lou.
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Old Mar 31, 2024 | 03:28 PM
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Originally Posted by loup68
I can't see that the front bumper has the welded on metal piece that the horse collar bolts to like in the above A.I.M. diagram. I do not see how the forward end of the rod would bolt up there. I made a rod for mine years ago and it fit, but I did not have your "L" bracket in the way. Lou.
DUB made modification (I believe) and we aren’t sure how to complete the front end frame extensions etc.

Maybe this video will provide some clarification because we cannot determine why things aren’t lining up.






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Old Mar 31, 2024 | 05:12 PM
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c1nicole
Ok. I'll go get a picture of the rod. Mine goes from below the rad to the header bar. I'm pretty sure it is "mostly" (iffily ) correct. Mine does NOT bolt in below the Rad-A/C condenser....just inserts into the hole in the support assembly.

UPC11-13 / A5, see post #20 above, shows the rod but it's a totally crappy AIM drawing..... makes it look more horizontal than vertical....gimme a few.....

Last edited by carriljc; Mar 31, 2024 at 05:37 PM.
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Old Mar 31, 2024 | 05:24 PM
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Originally Posted by carriljc
c1nicole
Ok. I'll go get a picture of the rod. Mine goes from below the rad to the header bar. I'm pretty sure it is "mostly" correct. Mine does NOT bolt in below the Rad-A/C condenser....just inserts into the hole in the support assembly.

UPC11-13 / A5, see post #20 above, shows the rod but it's a totally crappy AIM drawing..... makes it look more horizontal than vertical....gimme a few.....

We can’t see anything for it to bolt to.

Last edited by c1nicole; Apr 1, 2024 at 11:12 PM.
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Old Mar 31, 2024 | 05:25 PM
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c1nicole
Pictures of front support rod. Goes from Lower radiator frame to headlights support header bar.



Last edited by carriljc; Mar 31, 2024 at 06:16 PM.
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Old Mar 31, 2024 | 06:16 PM
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I went and looked my own AIM and UPC 11-13 / A4 -- it is different as to what was posted in #20. Still doesn't match my car but here it is anyway:


Last edited by carriljc; Apr 1, 2024 at 12:21 PM.
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Old Mar 31, 2024 | 06:44 PM
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You have the original 68 setup. I have a new hood surround so I can't look at mine to compare it to yours.You have two bolts holding that bracket on to the nose. There is usually only an elongated slot where the center is between the two bolts.
If you want the later rod, you need to remove the original "L" bracket going to the center brace. You would have to carefully drill a hole in the exact center of the metal fiberglass reinforcement between the two bolt holes.
The chrome bumper bolts to the center brace through the two rectangular holes in your picture. And it may need the special shims that they sell for this.
I feel that your lower brackets do not fit because the whole front end must come up a little. if it does not move than you would have to shim under the brackets to fit. Your vertical bumper guards bolt to those brackets. Lou.
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Old Mar 31, 2024 | 06:58 PM
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c1nicole
I just re-read this thread and I realized that I don't know what it is that you are trying to figure out?
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Old Apr 1, 2024 | 02:45 PM
  #33  
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c1nicole
This shows the support rod installation. Take a look at this at the 1 minute mark. Obviously MINE is different but maybe this will help you?

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Old Apr 1, 2024 | 06:17 PM
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Just posted these as its all I have. hope you're making headway.
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Old Apr 1, 2024 | 06:20 PM
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Nicole read post #6 https://www.corvetteforum.com/forums/c3-general/4777614-72-front-bumper-adjustment.html

https://www.corvetteforum.com/forums/c3-general/3691571-bumper-installation.html
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Old Apr 1, 2024 | 06:24 PM
  #36  
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https://www.corvetteforum.com/forums/c3-general/4238804-adjust-front-bumper-72-a.html

https://www.corvetteforum.com/forums...ackets-go.html

https://www.corvetteforum.com/forums/c3-tech-performance/3505581-68-72-front-bumper-installation.html

Last edited by caskiguy; Apr 1, 2024 at 06:36 PM.
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Old Apr 1, 2024 | 11:26 PM
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Originally Posted by 69L88
This is from the AIM. Your concern started with item#18 but you will also need item #17, plus some shims (item #25) and all related nuts, bolts and washers.

This is not a simple “bolt it all back in” exercise - the entire front hood/surround fair depends on how the surround is supported by all this bracketry. Also, if not properly positioned, you will put stress on the fiberglass, potentially resulting in cracks.

Is item #1 currently installed?


Yes, the unshaped “horse collar” is in.
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Old Apr 1, 2024 | 11:28 PM
  #38  
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Originally Posted by carriljc
I went and looked my own AIM and UPC 11-13 / A4 -- it is different as to what was posted in #20. Still doesn't match my car but here it is anyway:


I do not have that rod (#10) radiator support. It has no hole to bolt into on the front end.
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Old Apr 1, 2024 | 11:52 PM
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well... if you want that 3938060 rod you can buy it here: https://corvetteparts.com/item/rod-f...port-1968-1972

and I've come to the conclusion that my 68 "may" have the incorrect rod and that it may be installed inappropriately.... this looks like the rod on mine: 3974016
https://www.ecklerscorvette.com/1968...-123526-1.html

Last edited by carriljc; Apr 1, 2024 at 11:59 PM.
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Old Apr 2, 2024 | 01:59 PM
  #40  
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Be very careful with the end bolts on the bumper. If for some reason it is not fitting well, do not try to pull the bumper in with the bolts. The fiberglass will crack.
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