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256  Model Specific Discussions / Trans-Am Camaros / PRE-1969 SCCA SEDAN CATEGORY RECOGNITION FORMS for CAMARO Z/28 on: March 21, 2011, 01:51:27 PM
Per the subject title, these forms preceded the 1969 SEDAN CATEGORY RECOGNITION FORMS for the Chevrolet Camaro Z/28.

These forms were acquired from Charlton Jones, and with them came a note from Charlton that stated:

"These are the actual recognition papers I carried in 1969 to the Trans-Am events as series scrutineer."


257  Model Specific Discussions / Trans-Am Camaros / Re: Allowed/Required Modifications for 1967 TransAm Cars on: March 15, 2011, 04:08:51 AM
Hello Jason,

That's a great site you have going on the build of your '67 Camaro.  I'll surely check the site and your progress often.

When I read about your Muncie popping out of third gear upon decel, I thought I should mention that you can probably fix that for good with a set of "torque lock" (some say "hook lock") sliders:

I used to have the same problem in my old vintage Trans-Am Camaro (Muncie M21) until I switched to "torque lock" sliders.

It seems from your site that you're not sure about sticking with the Muncie transmission, but I think they're a great piece.  I've been vintage racing my Camaro for 11 years now, and have only done a couple rebuilds to the transmission in all that time.  I own or have driven other cars with well built T10s or Ford Top-Loaders, and the Muncie in my Camaro has a better shift feel than any of them.

258  Model Specific Discussions / Trans-Am Camaros / Re: Harrison Oil Coolers Used on Early Trans-Am Camaros on: March 14, 2011, 11:42:20 PM
Thanks Jon and Robert.  It's good to know that there were the single sided outlets after 1978. 

Jon, your note about these coolers most likely not being offered with outlets on each end is what I would lean towards as well.

I only asked the question because the alodine coating on this one cooler of mine seems fairly consistent over the areas of potential work... and the aluma-prep before alodin-ing would have taken off the ink stamps. 

Perhaps the person who did the mod of the cooler just spotted in the aluma-prep and alodine to preserve the ink, but that seems like a lot of care not normally shown for such a mod carried out long ago.  The fellow I purchased from wouldn't have cared, and he certainly didn't do the mod himself.

Oh well, it was worth asking.

259  Model Specific Discussions / Trans-Am Camaros / Re: Allowed/Required Modifications for 1967 TransAm Cars on: March 11, 2011, 12:14:49 AM
Hello Rick,

Though a few on this forum probably have the 1967 SCCA General Competition Rules for Trans-Am (and A-Sedan), it's a fairly large document.  I haven't digitally scanned the book, but others may chime in that have.

Here are a couple links from the Corinthian Vintage Auto Racing (CVAR) website, where they have taken excerpts of the 1967 SCCA GCR applicable to the Trans-Am and A-Sedan classes.  Any CVAR clarifications are inserted in italics after each GCR line item.  Thus, if you ignore the italics, it's much the same as the original GCRs.

MS Word Document of 1967 SCCA GCRs (with CVAR clarifications)
Google Doc Conversion (viewable without needing MS Word installed)
I hope this helps.

260  Model Specific Discussions / Trans-Am Camaros / Harrison Oil Coolers Used on Early Trans-Am Camaros on: March 09, 2011, 01:51:39 AM
Harrison oil coolers were used on several early Camaro Trans-Am cars, and were available over the counter at GM dealerships.  Well, these oil coolers were also used on many other GM race cars, including Corvette Grand Sports, many of the Can-Am competitors, Formula 5000 cars, and on numerous non-GM cars and engines as well.

The GM part number seen and quoted most often for the Harrison oil cooler of choice is 3157804.  Much of the "How to Hotrod" manuals and other sources from the late '60s and early '70s note something to the effect of them not being ready to use as is. They further specify that these coolers need to be cut apart and modified so that the oil flows into one end of the cooler and out the other.

The first pic attached shows a 1978 dated, 3157804 oil cooler that I have.  It flows from one end to the other.  From the plating wash that exists on the whole unit, it would seem that it came this way new.  If it didn't, someone took the time to dip/plate it as per original after the modifications.

The second pic attached shows quite a lot of original Harrison oil coolers, mounting brackets and other hardware that were offered on an eBay auction several years ago.  Note the various ends and fitting provisions on these 3157804 oil coolers.

Does anyone know if Harrison/GM ever offered these oil coolers with the flow (and fitting provisions) going from end to end?


261  Model Specific Discussions / Trans-Am Camaros / Re: Recommended Reading on: March 07, 2011, 06:02:03 PM
Though "The Unfair Advantage" BRUCE302 notes is a must read for those interested in Mark Donohue and his efforts with the Trans-Am Camaros... the more recent book that Michael Argetsinger released, "Mark Donohue: Technical Excellence at Speed" was even more illuminating to me.  The amount of information presented and additionally fact-checked by Argetsinger helps to make it the best driver biography I've read, and certainly one of the finest automotive racing history books as well.

There are a couple versions of this book offered, and this page of the publisher's site does a good job of explaining the differences, and allows you to purchase a copy as well.

262  Model Specific Discussions / Trans-Am Camaros / Re: 302 Chevy engine building articles [late '60 - early '70s] on: March 06, 2011, 05:52:55 PM
Another Bartz article from a December 1970 MOTORCADE magazine (loaned for scanning by CRG member BRUCE302):

263  Model Specific Discussions / Trans-Am Camaros / Re: 302 Chevy engine building articles [late '60 - early '70s] on: March 03, 2011, 02:16:04 PM
More on Al Bartz recently started on another forum:

Good news in the thread about Phil Henny working to write a book about Al.

264  Model Specific Discussions / Trans-Am Camaros / Re: 302 Chevy engine building articles [late '60 - early '70s] on: March 03, 2011, 11:53:08 AM
Al Bartz also built 302 Chevy engines for Trans-Am and Formula 5000 competitors.  Of course, he built motors for several in the Can-Am series as well.  Here is an excellent Al Bartz article from a January 1968, Sports Car Graphic:

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There is a whole chapter on Al Bartz in Phil Henny's book, "...Just Call Me Carroll...!"

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