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  #1  
Old 08-05-2019, 10:33 PM
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Default 303 Pontiac Engine at Norwalk

This was by far the neatest thing I saw in the swap meet area. What a piece of history.
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  #2  
Old 08-05-2019, 10:40 PM
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Very unique. Thanks for the pictures.

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Old 08-05-2019, 10:47 PM
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I wouldn't be surprised if Tom S. knows something about that particular engine.

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Old 08-05-2019, 11:18 PM
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Said to come from Buck Baker.Incorrect carb and balancer,pretty much everything else looked good.I have owned 2 of them that I did strokers too.One was 366 which a board member owns now and the othe 390 CI which was in my 69 TA that sold at Mecum last Saturday.Would like to have it was just not worth the 25K to me with out the carb and balancer.Tom

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Old 08-06-2019, 12:17 AM
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Cool that they consider those stamped steel rockers good enough for an engine like that.

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Old 08-06-2019, 09:47 AM
cdnroundport cdnroundport is offline
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Tom is that throttle bracket specific for A or F body?

  #7  
Old 08-06-2019, 10:00 AM
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Tom, did they modify the RA-V intake to allow installing the 3-Barrel 950 cfm carb in the intake?

Tom V.

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  #8  
Old 08-06-2019, 10:16 AM
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As a bonus, Dimitri Toth was at Norwalk to detail the machining & history of this engine. He still works at GM in their engine development area. The original engineering drawings called this a 302, but Chevrolet didn't like Ponitac having the same designation as their own 302, so management forced the change to 303.

It's interesting to note that the later 301 Pontiac engine used the same 1/2" lower deck height as the 303. Too bad they didn't stick with the stout bottom end of the 303.

Priceless piece of history for Pontiac lovers, but $25K was a little high.

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  #9  
Old 08-06-2019, 10:30 AM
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Tom,I did not pull the carb but I would assume so.Tom

  #10  
Old 08-06-2019, 10:32 AM
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The bracket was for either the birds or A bodies.The mount on the intake was setup to work with that bracket.Chuck Henley repoped the unique brackets.Tom

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Old 08-06-2019, 11:40 AM
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very cool!

I really like how 'Tom S' actually runs these engines... where as it seems that most others use them a paperweights.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #12  
Old 08-06-2019, 11:44 AM
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I bought a set of 303 heads,a intake and carb at Norwalk.I have a std deck 303 block being built as a 428 right now,hope to have it on the dyno the end of the month.I have a ready to build 301 turbo block here that I might put the 303 heads on it with a factory X ram 2-4 intake.Thats in the future maybe.Tom

  #13  
Old 08-06-2019, 11:49 AM
Chief of the 60's Chief of the 60's is offline
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Quote:
Originally Posted by unruhjonny View Post
very cool!

I really like how 'Tom S' actually runs these engines... where as it seems that most others use them a paperweights.
x2

Right up there with people who put muscle cars in their living room.

  #14  
Old 08-06-2019, 12:01 PM
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Quote:
Originally Posted by Chief of the 60's View Post
x2

Right up there with people who put muscle cars in their living room.
I think those are called "man caves" now... from the outside they look like a garage, but the inside paints a different picture.

I have done design work for many houses like this.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #15  
Old 08-06-2019, 01:05 PM
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Seeing those spread out ports on a Poncho sure gets ones attention!

X3 on Tom S at the forefront of continued exotica testing in the real world. But I bet he has a cool paperweight too, ha...………..

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  #16  
Old 08-06-2019, 01:11 PM
tom s tom s is offline
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LOL,I really dont.My problem is im not a collector.I build stuff and when im tired of it I move it on to someone else to enjoy.I have lost count on how many V engines I have built,think it around 7-8.I said the 366 NASCAR was my last but got sucked back in and had to go out in the market and buy stuff to put another together.My issue now is balancers,no clue where to find one after this current engine.Tom

  #17  
Old 08-06-2019, 01:20 PM
grandam1979 grandam1979 is offline
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They had a picture of the car it came out of next to the engine but I didn’t get a picture of it.

  #18  
Old 08-06-2019, 01:48 PM
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To those of us who have no clue...myself included.....what's a 303 engine?

George

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  #19  
Old 08-06-2019, 02:03 PM
Chief of the 60's Chief of the 60's is offline
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Quote:
Originally Posted by unruhjonny View Post
I think those are called "man caves" now... from the outside they look like a garage, but the inside paints a different picture.

I have done design work for many houses like this.
Actually, I have seen pictures of a Boss 9 in one guy's house and a Hemi Cuda Convertible in another guy's house. What a freaking shame.

  #20  
Old 08-06-2019, 02:04 PM
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Quote:
Originally Posted by george kujanski View Post
To those of us who have no clue...myself included.....what's a 303 engine?

George
/\ RAV engine, short deck, to reduce displacement and make it eligible for SCCA 'Trans AM' racing series which had a 5.0L displacement limit.
IIRC it was initially intended to be a production engine of sorts to make using it legal, but the SCCA adjusted their rules so that Trans Am's could be built with larger engines and still be eligible for the series.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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