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103754 Posts in 12185 Topics by 4697 Members
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2821  Model Specific Discussions / Trans-Am Camaros / Steering relay rods --- a.k.a. "drag links" on: May 15, 2011, 12:53:51 AM
In '67, all Camaros utilized a standard size drag link regardless of the model (L6, 327, SS, etc). The size was around .945" diameter or 15/16".
For Trans-Am racing, it was found fairly quickly that this drag link would bend under the constant pounding of a long race on a rough track
such as Sebring. This would, of course, adversely affect the handling of the car. I know for a fact that Mustangs also had the same problems.
What many teams did was beef up these drag links, such as welding angle iron to them. For Camaro, this was addressed in 1968 by offering
a larger diameter drag link with "special surface treatment", which meant it was shot peened and possibly tufftrided. This larger diameter drag
link was not a production piece, It was only available through the parts department and, as such, it is extremely rare. In '69, a larger diameter
drag link was made available on production line Camaros with air conditioning and/or power steering. Like the special '68 piece, it measured
over an inch, about 1.125" or 1 1/16" but it did not have the special surface treatment. If you're building a Camaro from scratch, you want to
start with one of these larger drag links but back in '67 you had to work with what you had and that meant beefing up the existing small one.

Comparison of smaller Camaro drag link to larger power steering one, which became available in '69.

"Special surface treatment" drag link on Chad's Trans-Am Camaro.

"Special surface treatment" drag link on Chad's Trans-Am Camaro. Note the tall ridge at the end which helps to ID it.

Original '67 drag link with angle iron welded to it (front view)

Original '67 drag link with angle iron welded to it (rear view)

Small diameter original drag link: p/n 3888637, superceded by p/n 3923587
"Special surface treatment" drag link: p/n 3923589 (racer part, very hard to find)
Larger diameter '69 drag link: p/n 3953221 (factory upgrade, not hard to come by)
2822  Camaro Research Group Discussion / Restoration / Re: OEM style full quarter panels '67 convert on: May 15, 2011, 12:11:47 AM
I don't believe anybody reproduces a quarter with that style of door jamb. If you want to save that look, you need to trim the quarter just about a 1/4" or so in from the edge of the jamb and do the same with the new replacement quarter. Then do a butt weld to join the new quarter to the original jamb. A good body person can make it undetectable.
2823  Camaro Research Group Discussion / Decoding/Numbers / Re: 67' to add to data base on: May 14, 2011, 11:44:57 PM
Cool. I love seeing another '67 getting saved. Best of luck with the resto.
2824  Model Specific Discussions / Trans-Am Camaros / Re: "Atta Boy" Jon, Guldstrand Camaro on: May 14, 2011, 09:30:58 PM
Below is a photo of Robert's car down in Mexico, blue #7. Not what you meant but I'll see what else I can dig up. Thank goodness
it wasn't the #3 in front of it.

The photo of the car and Robert in the Hot Rod article was taken when we took the car down to Guldstrand's shop a year or two
ago to show it to him.

Congratulations to Robert for getting a little public recognition and for owning a car he coveted after first reading about it in
Sports Car Graphic magazine a measly few decades ago. Little did he know the car was still "out there".

2825  Model Specific Discussions / Trans-Am Camaros / Re: 1966-1972 Trans-Am race memorabilia [dash plaques, patches, passes, etc] on: May 14, 2011, 06:00:08 PM
Dana Chevrolet racing ad from 1967.
2826  Model Specific Discussions / Trans-Am Camaros / Re: Factory rear sway bar set-up, 1967 on: May 14, 2011, 05:57:52 PM
That would be great, Bruce. Thank you.
2827  Model Specific Discussions / Trans-Am Camaros / Re: Factory rear sway bar set-up, 1967 on: May 14, 2011, 01:57:37 AM
Bruce, do you happen to have any photos of your rear sway bar set-up? If so, you could post them here? I'd love to see them and I bet others would as well.
2828  Model Specific Discussions / Trans-Am Camaros / Re: Factory rear sway bar set-up, 1967 on: May 13, 2011, 02:28:47 PM
Frank tells me the bar is identical to a front '67-'69 Camaro sway bar (except for the diameter). Many
thanks go out to Frank for sharing his photos and knowledge of this very rare piece of Camaro race
history. Frank has got one of the premier collections of Camaro performance and racing items and
hopefully we'll see more of it in the future.

I don't know why, how or where this stuff survived over the last several decades but it is sure great
to see that it has.
2829  Model Specific Discussions / Trans-Am Camaros / Re: Recommended Reading on: May 13, 2011, 08:51:40 AM
This is a good one which looks in-depth at many of the performance pieces such as cross rams, four-wheel disc brakes, etc
which were used on the Camaro in the Trans-Am series back in the 1960's and early '70s. It is not a history of the Trans-Am
series as a whole. It is a technical book focusing on various performance pieces. Very good read if that is your interest.

Camaro: Untold Secrets by Wayne Guinn
2830  Model Specific Discussions / Trans-Am Camaros / Re: Factory rear sway bar set-up, 1967 on: May 12, 2011, 10:39:09 PM
You're welcome, Chad.  I didn't realize you hadn't seen one of those before.

There is more information on this set-up in Wayne Guinn's Camaro: Untold Secrets book, for those who want to learn more.

2831  Model Specific Discussions / Trans-Am Camaros / Re: 69 Penske vinyl roof on: May 12, 2011, 09:44:24 PM
At the time there was a lot of speculation as to why the vinyl tops were on the Penske cars. People suspected lots of different reasons. I think one of the stranger hypotheses I've heard was that the vinyl top covered up tiny holes which released air pressure from inside the car. I don't think I have heard anything about a lowered roof but bondo and paint can cover up welds as good as any vinyl top can. I believe Mark Donohue was the one who stated that the vinyl tops were to cover up wavy roofs because the bodies of the two team cars had spent a little too much time in the acid tank. Yes, a normal unibody structure would suffer a lot from too much acid dipping and the roof does strengthen the structure of the body. However, don't forget that these cars had complete roll cages which attached to various parts of the chassis such as the front subframe, the rocker panels, the rear frame at the suspension pickup points, the side panels just aft of the door openings and it was also welded to the inner roof structure in a number of different spots. This is what became the birdcage type of frame for the car which was much stiffer than any unibody car, especially one without a B pillar behind the door, could be on its own.

Eventually, during the 1969 season the protesting of the vinyl tops got to be so much that Penske did have to have them removed and my understand is that the wavy roofs were cut off the cars and new roofs were rewelded in place, sans vinyl. It is a good thing, since Penske's cars finally started winning races with the vinyl tops off the cars and they went on to win the Trans-Am championship that year, making it two in a row.
2832  Model Specific Discussions / Trans-Am Camaros / Factory rear sway bar set-up, 1967 on: May 12, 2011, 11:16:20 AM
Below are several photos of an NOS rear sway bar set-up for the '67 Trans-Am Camaro The example
in the photos is owned by Frank DiHartce and the photos are courtesy of Frank as well. This is an
extremely hard to find racing part, not intended for any street car. It is estimated that possibly as few
as 10 of these complete set-ups were made. I am personally aware of three NOS complete sets still
out there. I've never seen one, or leftover pieces of one, on any of the West Coast Historic T/A cars.
Has anybody else seen this set-up on a car?

2833  Camaro Research Group Discussion / Decoding/Numbers / Re: RPO MA6 on: May 10, 2011, 05:26:59 PM
Photo of the MA6 clutch in the March '70 issue of Motor Trend.

2834  Model Specific Discussions / Trans-Am Camaros / Re: Scattershields on: May 10, 2011, 04:53:33 PM
Here's the Wedge version. Note the M/T marking on the housing also. I know Mickey Thompson had some involvement
with these but over the years I have forgotten if it was just a promotional deal between Wedge and M/T, or if Wedge
purchased the scattershild business from M/T. There are some Wedge scattershields for Fords that say COBRA on them.
Wedge was the brand that Shelby used but that may have changed by the later end of the '60s.

2835  Model Specific Discussions / Trans-Am Camaros / Re: Engine photos on: May 10, 2011, 03:00:18 PM
Did they try to section the rad supports to lower the front end profile? That would be trick...

Yes, that sort of thing (and other stuff too) definitely occured. I remember a conversation I had with Dan Lipetz, the current owner of the '70 Parnelli Jones Boss 302. He told me you can't take a stock '70 Mustang fender and hang it on the front of a (Bud Moore built) Mustang like his. It won't come close to fitting. He said you might as well be trying to hang a Camaro fender on it. His point was the fender was sectioned and modified to decrease the frontal area of the car and lower the nose. These sorts of changes occured less as you moved down the food chain from well-funded to low-funded teams.
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