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2311  Model Specific Discussions / Trans-Am Camaros / Re: Firebird and the Trans-Am series on: September 15, 2011, 10:05:38 PM
Thanks, Bruce. I measured the distance between the upper set of holes and the lower set of holes and for the JL8 bracket the distance was 2-5/8" or approximately 66.5mm. For the drum brake backing plate, the distance was 2-13/32" or approximately 61.5mm. Looks like yours is unique.
2312  Camaro Research Group Discussion / Originality / Re: 67/8 Cowl Hoods, Factory? on: September 15, 2011, 09:39:17 PM
The hood came about because special raised hoods were in fashion at the time. They already had the cowl plenum underhood induction in '67 and '68 but in '69 obviously the cowl induction hood was used by the Penske team and others. After that, air induction was not supposed to be through the scooped hoods but instead drawn from under the stock hood. I'm not sure why SCCA bothered with that.
2313  Camaro Research Group Discussion / Originality / Re: 67/8 Cowl Hoods, Factory? on: September 15, 2011, 01:45:55 PM
I'm not questioning whether the car was missing the hood in subsequent years. I was simply replying to Dale's question about whether one of these hoods were optional on a '67 or '68. That's why this car deserved mentioning because it did in fact have the hood on it in the summer and fall of '68 and it was put there by GM. The hood did not truly become available to "the average Joe" until the '69 ZL-1 started being produced at the end of December '68. Of course, it could be said the '69 ZL-1 purchaser was not your "average Joe" either.  Wink
2314  Camaro Research Group Discussion / Originality / Re: 67/8 Cowl Hoods, Factory? on: September 15, 2011, 10:10:10 AM
Picture of car below with '68 Michigan plate on it shows Estes' car had the cowl hood on it. Whether that was removed at the time of "retail sale" at the end of December, who knows but it most definitely was on the car when owned by Pete Estes and when used to pace the Road America Can-Am. The window sticker that you have Bill is not what was originally issued by GM when the car was built.
2315  Camaro Research Group Discussion / Originality / Re: 67 mountain green code H formula on: September 15, 2011, 10:00:48 AM
Ron, when I had the mountain green car I had to spot paint the lower valance panel and I used H-code Dupont lacquer which was still available at the time. I have no idea on what formula to use on todays base coat/clear coat paints. Would love to help if I could but I can't in this instance.
2316  Model Specific Discussions / Trans-Am Camaros / Re: Ideas to share concerning 1:18 '67-'69 GMP Penske Donohue Camaros. on: September 14, 2011, 10:21:34 PM
It's coming along nicely, Mike. Very good progress and the bumper does seem to be better. I'm looking forward to your work on the rear suspension. No doubt some challenges await you there...
2317  Model Specific Discussions / Trans-Am Camaros / Re: Firebird and the Trans-Am series on: September 14, 2011, 10:11:54 PM
Bruce's rear axle tube is not a Camaro piece. Looks to be Pontiac but I'm not sure if it's Firebird or borrowed from something else.

Below are the JL8 bracket and drum brake backing shield. On the JL8 bracket, the distance between the upper pair of holes is 3-3/8" or approximately 86mm.
The bottom pair of holes on the JL8 bracket is the same distance across (3 3/8").
On the Camaro drum brake backing plate, the distance between the upper pair of holes is 3-3/32" or approximately 78.5mm. The lower pair of holes are
closer together and measure 2-21/32" or approximately 67.5mm.



I'm going to take a guess and say Bruce's flange hole pattern is neither one of those and that might be why they had to fabricate their own caliper bracket.
Bruce, if you ever get a chance to measure that bolt pattern, let us know what you find out.
2318  Camaro Research Group Discussion / Originality / Re: 67/8 Cowl Hoods, Factory? on: September 13, 2011, 10:22:27 PM
For the sake of a complete answer, at the September 1, 1968 Can-Am, Sterling Moss drove the Pete Estes '68 Z/28 convertible (1 of 1 made) as the pace car and it had a cowl induction hood on it. It may not have been installed on the assembly line (there is no definitive proof either way) but it was installed on the car by GM, probably at the Tech Center. This is many months before any '69 got it.
2319  Model Specific Discussions / Trans-Am Camaros / Re: Firebird and the Trans-Am series on: September 13, 2011, 04:57:52 PM
Are you asking about whether or not the axle tube tapers down where it meets the 4-bolt flange at the outer end?
2320  Model Specific Discussions / Trans-Am Camaros / Re: Firebird and the Trans-Am series on: September 12, 2011, 05:22:23 PM
Great photos, Bruce. Thanks for posting those. Here is the GM bracket for comparison's sake.







2321  Model Specific Discussions / Trans-Am Camaros / Re: "Inside the Cars of the Trans-Am" and other articles on: September 12, 2011, 04:13:37 PM
Here's a decent article on the suspension and handling of the '68 Trans-Am cars from my November '68 issue of Car Life magazine.














2322  Model Specific Discussions / Trans-Am Camaros / Re: 1968 Bryar Trans-Am photos on: September 12, 2011, 03:44:13 PM
Another article on the '68 Bryar Trans-Am. This one is from my November '68 issue of Car Life magazine.







2323  Model Specific Discussions / Trans-Am Camaros / Re: Firebird and the Trans-Am series on: September 11, 2011, 06:41:31 PM
It's always a bit fun to post something people have not seen before. I'm glad you guys enjoyed that.

As for pictures or info on the Pontiac rear axle, Bruce302 owns one of these '69 Titus Firebirds with most of the original pieces intact. Bruce told me that a website with good knowledge of the BOP axles can be found at http://www.jdrace.com/

Some of it may be conflicting, but this page has specs on the axle that matches his. Bruce states..."I have a 10 bolt rear cover, 12 bolt ring gear bolts, 31 spline axles, and it seems the Olds unit was the primary user of these parts. That is why [Firebird racer] Frank Eggers used the type O axle. Because the type of car these came in was not as regularly used as a serious performance car, the rear end has been neglected. Few have known that there were rear ends with 10 bolt covers [that] had 12 bolt internals. Here is another exchange on the rear ends.  http://forum.jdrace.com/viewtopic.php?f=17&t=212 "


                    Ring Gear Diameter                    8.875
                    Ring Gear Bolts                         12  (Inspection Cover bolts 10)
                    Ring Gear Bolt Size                    7/16 Left Hand Thread
                    Axle Spline                                31  bolt in
                    Pinion Spline                              29
                    Pinion Diameter                         1.625
                    Axle Shaft Diameter                   1.40
                    
                    Supported Cars:   
                    Car                                        Year
                    Bonneville                                65-70
                    Grand Prix                               65-68
                    Catalina                                   65-70
                    Executive                                 65-70
                    
                    Rebuild Kit Includes:   
                    Part                                        Part Number
                    Carrier Bearing                          LM603049
                    Carrier Bearing (Race)               LM603012
                    Inner Pinion Bearing                   M88048
                    Inner Pinion Bearing (Race)        M88010
                    Outer Pinion Bearing                  M802048
                    Outer Pinion Bearing (Race)        M802011
                    Pinion Seal                                2043
                    
                    Mega Axle Bearing Seal Kit:
                    Axle Bearing (C-Clip)                  5707
                    Axle Seal (c-clip)                        8660S



I can add that Bruce's rear caliper brackets were not the same as those used by the Camaro teams (Corvette right-rear brackets). His brackets are different and, if I remember correctly, are a completely machined piece rather than a casting with some small machined areas. I hope this is helpful.
2324  Model Specific Discussions / Trans-Am Camaros / Re: Sunoco fueling rig on: September 11, 2011, 10:57:32 AM
Yes, when you are putting 22+ gallons of fuel into a car in 3 or 4 seconds that would definitely be considered dumping and not pouring.  Grin
2325  Model Specific Discussions / Trans-Am Camaros / Re: Recommended Reading on: September 11, 2011, 10:13:07 AM
Thanks for the further recommendations, Mike. I have not seen that last book before but like you I did get a lot of enjoyment out of the interviews found in Fast Chevys.

The update from Dan Lipetz as of this morning is the editing for the book by David Bull was not completed when it was originally scheduled to be. Then he (David Bull) was in a terrible motor cycle accident in late July.  Dan has not spoken with him since and it is unclear what his current condition is.  So, no book yet!

I had not heard about David Bull's accident and wish him well.
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