How to tell a GM cowl hood from a repro cowl hood? - Team Camaro Tech
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post #1 of 35 (permalink) Old Sep 19th, 03, 09:03 AM Thread Starter
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Hey, I have a 69 Camaro with a cowl induction hood.. how do you tell a real GM hood from a aftermarket one like Goodmark or such??

TIA

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post #2 of 35 (permalink) Old Sep 21st, 03, 06:17 AM Thread Starter
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Wow.. thanks for the replies.. that was helpful..

(please note the sarcasum..)

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'68 Camaro - LS2, T56, Three Link, yada yada

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post #3 of 35 (permalink) Old Sep 21st, 03, 06:35 AM
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You should check the archives for the answers that are not there from all the other times the question was asked. [img]tongue.gif[/img]

-Mark.

P.S.- Please note sarcastic reasponse. [img]graemlins/waving.gif[/img]

The only thing I could ever see was that the repro I bought did not have the 4 dimples around the mounting bolt holes like the GM one I bought. At least I was told it was a GM hood. The GM sticker came off a little too easy IMHO so now, I am unsure if it was actualy GM. It did fit better than the known repro. The GM hood also had 3 spot welds where the rubber bumper stops ride in the front where the repro had 4 spot welds in the same area. Other than that, nobody has ever been able to conclusively I.D. them.

Some folks argue that the GM piece is heavier but how would you know by looking? A used hood has lots of paint on them so they would definately weigh more so how useful is that?
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post #4 of 35 (permalink) Old Sep 22nd, 03, 01:59 AM
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I have a GM hood that is vintage 69. I noticed that by the cowl, you can see some very small cracks in the metal at the point of the hood being stamped to form the cowl. Hope I'm making myself clear but it's evidence of the process way back then. You wouldn't see it on the new (er) repros.

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post #5 of 35 (permalink) Old Sep 22nd, 03, 11:14 AM
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I've been told, but not actually observed, myself, that the front corners of the original hoods were curved downward slightly. The repops are more flat, so that they don't follow the contour of the fender, as well.
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post #6 of 35 (permalink) Old Sep 22nd, 03, 01:13 PM
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Hey....I just learned this trick today!!!

You can easily tell the difference in the seam...um, well....It's probably easier to show a picture....




You see that edge....On a repop it's straight, but on a factory hood there is like a hook molded in. I don't have a picture of a factory hood, but I just looked at three today.

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post #7 of 35 (permalink) Old Sep 23rd, 03, 04:44 AM
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Hey, Paulm,
I just checked my GM hood, and it has two notches in that lip. one about 8" back from the front edge of the hood,(where your arrow is) and another about even with the front of the hinge. Your pic did not show the hinge area, so I'm not sure if the reproduction ones have the notch near the hinge.
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post #8 of 35 (permalink) Old Sep 23rd, 03, 05:18 AM
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Hi All,
An easy way to tell a original hood from a repop is, Look at the rear corners of the hood where it meets the cowl and fenders. With the hood open,On a GM hood there is a little kick down or notch in the metal. On a repop there is just a 45 degree angle in the metal. This may sound confusing but if you look at the hoods you can spot the differance from 20' away.
I hope this helps,
Nick
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post #9 of 35 (permalink) Old Sep 23rd, 03, 06:23 AM
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Unreal, could you snap a picture so that we can show the difference in the area that I was trying to describe?

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post #10 of 35 (permalink) Old Sep 23rd, 03, 06:53 AM
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Paul, is that pic a repro or factory? Ya lost me.
I can snap and post a bunch of shots of a factory one tonight.
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post #11 of 35 (permalink) Old Sep 23rd, 03, 09:10 AM
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Sorry Joe, mine is a repop!

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post #12 of 35 (permalink) Old Sep 23rd, 03, 01:33 PM
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http://home.rochester.rr.com/hwystar/CowlHood/

Here's 8 shots of an old factory hood. I have a bunch more and larger versions of all if anyone wants them.

[ 09-23-2003, 05:28 PM: Message edited by: HwyStarJoe ]
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post #13 of 35 (permalink) Old Sep 23rd, 03, 03:50 PM
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Thanks Joe!!!

Here is a difference that is easy to see.....


Repop hood with straight edge:




GM hood with notched edge:


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post #14 of 35 (permalink) Old Sep 23rd, 03, 04:24 PM
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Wow, now that is easy to see! I just had to go out and check my hoods (standard and cowl) and both have the original notches. Now I have something fun to do at the next car shows

I just found out the differences between repro gas tank supports too. Originals have the rear bolt hole slot side to side, repros have the slot front to back.

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post #15 of 35 (permalink) Old Sep 24th, 03, 11:31 AM
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Does that mean my cowl hood setup is original too? WOW thats cool for a change.
mines bigger than yours nener nener nener


Click..is Jim..former owner of a 69RS-LM1 350/255 - 700r
"There will come a time when you believe everything is finished,
That will be the beginning." Louis L'Amour

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