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Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 08-16-2008   #1 (permalink)
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Default installing side scoops help

going to install fiberglass side scoops on my 67 coupe,what is the best way to attach them and blend them in with the body ?? had several different opinions, thought i would see what you guys think thanks!!
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Unread 08-16-2008   #2 (permalink)
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Quote:
Originally Posted by binx51 View Post
going to install fiberglass side scoops on my 67 coupe,what is the best way to attach them and blend them in with the body ?? had several different opinions, thought i would see what you guys think thanks!!
What you can do for test purposes is use some double sided 3M tape to stick them on to first make sure your happy with the look. For the permanent solution just use 5-Minute Epoxy and that'll hold those suckers on with more than enough bonding strength. Once that's done you can just leave it as it or fiberglass it to the body and re-paint that section of the body so everything is seamless. It's a quite a bit of work but it's worth it.
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Unread 08-16-2008   #3 (permalink)
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5 min. epoxy like from an auto parts store??
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Unread 08-16-2008   #4 (permalink)
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Originally Posted by binx51 View Post
5 min. epoxy like from an auto parts store??
Yep. I recommend the J-B Kwik Epoxy adhesive (attached picture) and you can pick it up at AutoZone, Napa and most other auto parts stores for about $5.
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installing side scoops help-jbw-epoxy.jpg  
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Unread 08-16-2008   #5 (permalink)
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That might hold, however when the guy who painted my car suggested using some type of adhesive that he swore would hold it ( I don't know what type so I would not wish to generalize), I agreed, but I was travelling down a county road doing around 100 (yes I was exceeding the posted speed limit) and the drivers side scoop blew off. right before a show that I attended. so after that I reattached them with 4 allen head bolts you can position them with the allen wrench and they are low profile. I did have to drill the sheet metal so You want to be sure you like them. I also used the adhesive again, in addition if you do not plan to make the scoops functional I suggest not completely sealing up the seams as they catch a lot more air than you might think. Shelby used pop rivets on the original shelby mustangs I believe.
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Unread 08-16-2008   #6 (permalink)
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I used rivets. Three on each side for a total of nine. Then, I used Bondo to blend the scoop into the body for a seamless look. However, I've noticed that Bondo has a tendency to crack, mostly on my hood scoop where I did the same thing.
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Unread 08-16-2008   #7 (permalink)
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You've got nothing to worry about, use the J-B Kwik and you won't regret it. Drilling into the body for side scoops is entirely unnecessary with the exception of using rivets on certain styles of scoops. Side scoops aren't subjected to even a fraction of the wind force that hood scoops are. Fiberglassing the side scoops to the body for a seamless install looks a lot better and would actually DECREASE the wind resistance.
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Unread 08-16-2008   #8 (permalink)
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you may be right. I will just point to my experience not my opinion. my side scoop did fly off. I will not say that the adhesive used was jb epoxy, but whatever it was I was told the same thing, don't worry. well one lost shattered scoop later I decided a few small well sealed holes was cheap insurance.
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Unread 08-16-2008   #9 (permalink)
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Quote:
Originally Posted by mccance View Post
you may be right. I will just point to my experience not my opinion. my side scoop did fly off. I will not say that the adhesive used was jb epoxy, but whatever it was I was told the same thing, don't worry. well one lost shattered scoop later I decided a few small well sealed holes was cheap insurance.
Did you install your hood scoop just for cosmetic reasons or did you cut out the hood to make it functional?
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Unread 08-16-2008   #10 (permalink)
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We screwed them on with sheet metal screws on our 66 coupe. They are NON FUNCTIONAL because i feel having the window work is important.
Filled trim holes in body with metal screen and JB weld on top and then a skim coat of bondo.

We have not filled in the screw holes yet in the fiberglass . we will fill holes with Fiberglass resin and chopped glass and then sand smooth.
There is no room for a pop rivet gun in the coupe. BELIEVE me we tried.
JB weld has no flex strength and can fail

Here are pics of the entire process from our web site.
Scoops
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Unread 08-16-2008   #11 (permalink)
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I originally had side scoops and flares on my 1966 Mustang coupe. They were riveted on and then I use fiberglass cloth and resin to attach them to the body after sanding all paint off. I used fiberglass filler to complete the job and then primed them. They were super strong and looked great. As time wore on, I decided I didn't like the scoops or flares and both were removed to return to an original body. Make sure thats what you want before you do it. I have been doing bodywork since 1976. Do it the right way the first time. That all I want to say on that issue.
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Unread 08-16-2008   #12 (permalink)
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Quote:
Originally Posted by 66 restomod View Post
We screwed them on with sheet metal screws on our 66 coupe. They are NON FUNCTIONAL because i feel having the window work is important.
Filled trim holes in body with metal screen and JB weld on top and then a skim coat of bondo.

We have not filled in the screw holes yet in the fiberglass . we will fill holes with Fiberglass resin and chopped glass and then sand smooth.
There is no room for a pop rivet gun in the coupe. BELIEVE me we tried.
JB weld has no flex strength and can fail

Here are pics of the entire process from our web site.
Scoops
You're right about J-B Weld, when it's dry it's very strong but brittle which is why no one suggested using it to attach the side scoops.
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Unread 08-17-2008   #13 (permalink)
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Quote:
Originally Posted by dakine858 View Post
Did you install your hood scoop just for cosmetic reasons or did you cut out the hood to make it functional?
I said my side scoops, you know brake scoops, but no I did not make them functional I just put them on for cosmetic reasons.
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Unread 08-17-2008   #14 (permalink)
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We have not finished the body work yet and I am debating on blending the scoops into body. I know bondo or rage filler does not like to flex and will crack, so I am debating about fiberglassing the joint or using a 3M poly seam sealer (in a tube) that was recommended by the people who sell Eleanor kits.
Does anybody have thoughts on blending them in?

Christophers 66 Mustang Restoration and Modification
A code 66 coupe
289 4v, Roller Rockers, Electric fan
Performer & 650 Edelbrock
MSD ignition
Tri Y into 2.25 Shelby side exhaust
T5 conversion
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Unread 08-17-2008   #15 (permalink)
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Quote:
Originally Posted by 66 restomod View Post
We have not finished the body work yet and I am debating on blending the scoops into body. I know bondo or rage filler does not like to flex and will crack, so I am debating about fiberglassing the joint or using a 3M poly seam sealer (in a tube) that was recommended by the people who sell Eleanor kits.
Does anybody have thoughts on blending them in?

Christophers 66 Mustang Restoration and Modification
A code 66 coupe
289 4v, Roller Rockers, Electric fan
Performer & 650 Edelbrock
MSD ignition
Tri Y into 2.25 Shelby side exhaust
T5 conversion
Hydraulic clutch
Granada Disks
Fiberglass is my hands down recommendation and personal choice when it comes to blending any aftermarket components into the body. It's a little more difficult if you haven't had much experience with fiberglass but after a little reading and a few hours work, you'll be thrilled with the results.
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