rear valence info needed
Thread Starter
Racer
Joined: Sep 2009
Posts: 459
Likes: 0
From: Belair Md
rear valence info needed
I just purchased a rear valence it is an original gm part#3948133 spec.40-2351-gb--69 this valence is 3/8 to short.is this because Im changing a under car exhaust to a side exhaust? what is the measurment between the quarters is it the same? mine measures 42 3/4
Administrator
Joined: Jul 2000
Posts: 53,982
Likes: 6,209
From: About 1100 miles from where I call home.
If you are changing to side exhaust, is the new valance a "filler" type that plugs the existing outside holes from the original exhaust?
BTW, I just had my '69 painted, and I had 2 valances that didnt fit properly.
BTW, I just had my '69 painted, and I had 2 valances that didnt fit properly.
Thread Starter
Racer
Joined: Sep 2009
Posts: 459
Likes: 0
From: Belair Md
rear valence
no this is an original side exhaust panel with the straight ends.if I move it to the left 3/8 the 2 bolt holes line up and vice versa .however if i put it in the center none of the holes line up nor do the edges around the license plate hole or the ends.thank you
1969/1971/2021 Coupes
Joined: Jan 2008
Posts: 2,212
Likes: 80
From: Port Huron MI
St. Jude Donor '09-'10-'11-'12-'13-'14-'15
I am doing the same thing (under to side exhaust) but I am using the filler panel that vettebuyer mentioned. I just went out and measured mine and found that it is 43 1/8 inches (providing we are referencing the same measurement points). Looks like there may be some vehicle to vehicle tolerances which I've often heard before.
Drifting
Joined: Jul 2004
Posts: 1,695
Likes: 65
From: Kissimmee fl
Finalist 2021 C3 of the Year - Modified
2017 C3 of Year Finalist
Cruise-In VIII Veteran
St. Jude Donor '07
I just measured fender to fender as described above on my factory side pipe car. I get the same 43 1/8 like above. sounds like the panel you have may be a bit short.
Thread Starter
Racer
Joined: Sep 2009
Posts: 459
Likes: 0
From: Belair Md
rear valence
thank you thats a shame this panel is in new cond and you can see where it was bolted up once I do not want to cut or modify a nice factory part that someone else could use but I dont want to stick anyone else with a bad part.
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1969/1971/2021 Coupes
Joined: Jan 2008
Posts: 2,212
Likes: 80
From: Port Huron MI
St. Jude Donor '09-'10-'11-'12-'13-'14-'15
My old valance measures about 42 and 7/8ths. My new one is exactly 42 and 3/4's like yours. However all of my mounting points line up ok but looks like I'll have to glass over the areas around the exhaust outlets and edge where we measured from. I was prepared for this though as I've always been told of stories when fitting panels there would usually be some degree of modifications needed as all of these style Vettes have slightly different fit and form. As I mentioned in my PM to you, there is also a small degree of flex when I sat under the car and pulled in on the quarters. That may help with some of the difference.
Terry
Terry
Team Owner
Joined: Sep 2006
Posts: 31,267
Likes: 4,362
From: Westminster Maryland
Hi 69R,
These are a couple of pictures of the .......133 valance on my 71. It measures 42 7/8".
I BELIEVE that for the 69 m.y. the whole rear quarter was different on side exhaust cars than the one on under car exhaust cars (the factory didn't do a fiberglass modification). Could this be the cause of your problem?
Since youre going to need to do some fiberglass work on the quarters, for the bezel cut out, can you make the valance fit at that time?
Regards,
Alan
These are a couple of pictures of the .......133 valance on my 71. It measures 42 7/8".
I BELIEVE that for the 69 m.y. the whole rear quarter was different on side exhaust cars than the one on under car exhaust cars (the factory didn't do a fiberglass modification). Could this be the cause of your problem?
Since youre going to need to do some fiberglass work on the quarters, for the bezel cut out, can you make the valance fit at that time?
Regards,
Alan
