#5601  
Old 11-21-2022, 08:45 PM
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wow ... amazing that those dots were connected so many years later.

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  #5602  
Old 11-22-2022, 06:38 AM
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Default 23P100039

Wanted to share some pictures here. Finally had time to collect and unpack.
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  #5603  
Old 11-28-2022, 02:41 PM
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Here is the intake 490471 which does not sport the LS2 or LS2 X. Click image for larger version

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Old 11-28-2022, 02:47 PM
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Also if you look at the cylinder heads their was some holes that have been plugged .

Also the block number stamped on the pad is 490132 but the block is stamped 212 not the usual 132 that we are used to seeing. Click image for larger version

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Old 11-28-2022, 03:21 PM
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Thanks for all the pics!

That intake with the EGR setup made in 1971 is cool. They knew back then they would need the EGR setup.

Edit: This was in a 1973 GA so needed the EGR manifold.


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Last edited by johnta1; 11-28-2022 at 03:47 PM.
  #5606  
Old 11-28-2022, 07:12 PM
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Thanks for sharing the story on this! This has to be one of the coolest finds in a long time. I'm really surprised that the engine survived being that it was cast so early before the actual production of SD's began

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  #5607  
Old 11-29-2022, 11:10 PM
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Road test of SD TA and SD GA:





Think this is the GA?


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  #5608  
Old 11-30-2022, 08:45 AM
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Great read and thanks to all those for sharing the info with us to enjoy. Cheers

  #5609  
Old 11-30-2022, 09:08 AM
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Default TA VS GRANDAM

What is the chances of that.
My 73 TA up against the 73 Grand Am and they will be together again also lol .



Quote:
Originally Posted by johnta1 View Post
Road test of SD TA and SD GA:





Think this is the GA?



  #5610  
Old 11-30-2022, 10:21 AM
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Quote:
Originally Posted by mscicluna007 View Post
What is the chances of that.
My 73 TA up against the 73 Grand Am and they will be together again also lol .
Unfortunately, the two cars in the article above are neither of those whose VINs we know today. The timelines just don't workout.

The article above is from the October 1972 issue of Motor Trend magazine.

Michael's Super Duty Trans Am (magazine test car) wasn't built until December 1972.

The recently-discovered Super Duty Grand Am was built in mid-September 1972. While at first it may seem plausible, publishing lead times were at least 2 months out back then, so it's impossible that the recently-discovered Grand Am was that shown in the Motor Trend article.

Furthermore, I can confirm that the images above were taken at Pontiac's 1972 Long Lead Press Preview held at GM's Milford Proving Ground in late-June 1972. The photos still exist in Motor Trend's photo archive and possess a development date of July 1972. Both of these cars along with a number of other Super Duty 455-powered engineering mules were available for magazine writers to test drive. It was at this same event that High Performance Cars magazine awarded the 1973 Super Duty GTO is Car Of The Year award.

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Old 11-30-2022, 05:00 PM
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Default Thanks Rocky

Glad you set it straight Rocky.
They do look similar. You always spot the details.

  #5612  
Old 02-18-2023, 06:35 AM
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What is the story here, legit SD Formula?

https://www.youtube.com/watch?v=cBeQ6VJnq4o

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  #5613  
Old 02-18-2023, 07:54 AM
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I know a guy who had one just like that. He was from Florida (Sarasota) and showed it at Springfield IL POCI show years ago. He sold it a few years ago, not sure where it went.



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  #5614  
Old 02-18-2023, 12:57 PM
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Quote:
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What is the story here, legit SD Formula?

https://www.youtube.com/watch?v=cBeQ6VJnq4o
On Mike's Facebook Group
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Old 02-20-2023, 12:54 AM
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My buddy has one here...originally yellow with black top...rare as hens teef hut still drives the wheels off lol....
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  #5616  
Old 04-09-2023, 02:17 PM
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Mike Noun posted on Facebook and I thought it should be here.
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  #5617  
Old 04-09-2023, 05:36 PM
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Thanks for that, Mike.



I always thought how great it would have been if the heads had the same cc's as the RA IV head chambers. Pontiac always hated the power loss from the restrictive FB exhaust also. It killed over 100 HP.


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  #5618  
Old 04-13-2023, 11:21 PM
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Nice. Thanks HFR and Mike.
I don't think I have ever seen this and I have questions:
Tuned Headers. From...?
M-7 cam. Not sure I have heard of this before. Specs? Guesses?
Holly, eh? Specs? [850+ cfm so no QJ ??]

I'm not sure but carb in picture looks odd for a production SD carb. Yes / No ?

Maybe I just forgot this stuff.

SDD

  #5619  
Old 04-14-2023, 06:20 AM
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I think the cam was a General Kinetic? I think the duration was 300/310?

The headers were JR 2 1/8" headers.
The Holley was a vacuum secondary 850.
The Rat Killer test was 11.84 cr using the RA IV head I think. (basically like SD head except 72 cc chambers compared to the 114)


The recommendation was to improve the Firebird exhaust.


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"People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates

Last edited by johnta1; 04-14-2023 at 06:36 AM.
  #5620  
Old 04-27-2023, 04:05 PM
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https://bringatrailer.com/listing/19...c-firebird-17/

Back to BaT. I think it was bid to over 100K with no sale last time.

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