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Rear Valence hole location
#1
I am trying to install the rear valance and need some help.

Does anyone have a hole size and location for the hole in the bottom of the quarter panel to receive the valance mounting bolt?

I plan to oversize the hole some,  but I need some coordinates.

So far, I hanged the valance by the tail light panel bolts and used tape to get the approximate location shown.  I am unsure how to verify before drilling. 

Please help! 

Kcmash

[Image: 20190528-165339.jpg]

[Image: 20190528-165326.jpg]

[Image: 20190528-165313.jpg]
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#2
Before you commit, hang the valance and the bumper and step back to make sure they are even vertically. You could end up with a big gap on one side if you don't do this.

To locate the hole, get a couple carriage bolts that fit the keyhole slot in the valance. Use a spacer and a nut to lock it down to the valance, then mount the valance to the taillight panel. Put a blob of grease, paint, blood or whatever on the tip of each bolt and swing the bottom of the valance into position. Whatever you put on the bolt will transfer to the quarter and you have your drilling locations.


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#3
The hole is supposed to be rectangular. If you can hold out to Friday I can get you some pictures and measurements.
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#4
Well, I have not found a way to drill square holes yet;-)

Actually we came up with an idea to insert a crayon in the fastener slot on the valance.  It worked quite well.
[Image: 20190528-171924.jpg]

[Image: 20190528-171908.jpg]
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#5
(05-29-2019, 07:40 AM)kcmash Wrote: Well, I have not found a way to drill square holes yet;-)

Actually we came up with an idea to insert a crayon in the fastener slot on the valance.  It worked quite well.
[Image: 20190528-171924.jpg]

[Image: 20190528-171908.jpg]

goodpost

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 044.jpg]

https://youtu.be/SoW1fhaFPzY
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#6
To get you a square hole if you need 1/4" just drill 1/4" diameter hole and use a small file to square the corners. I do not remember the bolts size there? Probably not over a 1/4" might be a 10-24.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
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#7
(05-29-2019, 08:37 AM)Carolina_Mountain_Mustangs Wrote: To get you a square hole if you need 1/4" just drill 1/4" diameter hole and use a small file to square the corners. I do not remember the bolts size there? Probably not over a 1/4" might be a 10-24.

Yep!  Takes ones of minutes to make a square hole with a sharp file.  That way the special fastener does not spin round and round.
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#8
https://grauly.com/products/easysquare

73 modified Grandé 351C. Almost done. 
71 429CJ. In progress
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#9
You could get a square hole punch, but they have gotten ridiculously expensive. A few minutes with a file will take care of it. You can use a Dremel with the pointed carving bit to rough it out and finish with a triangular file.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#10
btw, why is that hole square?
Bought this set a while back.
https://www.cjponyparts.com/media/catalo..._1.395.jpg

The extra plate ensures the bolt doesn't turn (when new, not after 48 years). As the square hole is much bigger, hence the need of a washer for the nut.
Wouldn't a smaller round hole make more sense?

73 modified Grandé 351C. Almost done. 
71 429CJ. In progress
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