#81  
Old 05-13-2022, 04:23 AM
TRADERMIKE 2012 TRADERMIKE 2012 is offline
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Originally Posted by turbo69bird View Post
The alternator is just a newer GM one wire set up.
The linkage is what was on it in 1970 when it was raced by Stephens Pontiac. Although it had a pan and 2-inch spacers This was their pro stock engine. The car was their stock eliminator RAIV car.
We are pretty sure this engine was tested and tuned in this car between when the engine was delivered and when the new 70 pro car came along. Because one of its hoods was cut for the dual quad's the other was not. Anyway, my RAIV engine was out for a freshening so I put the RAV set up in it. I didn’t want to use the alternator and radiator because they are all cleaned up and ready to go, rare and pricey,

There’s an article about the pro car in rodder and super stock. Jan 72. A quick Google search will
Pull Up pictures of the other two cars and many pics these days. Anything you see 70 to 73 is the same car just changed around a little for each season. My 69 had a season change in graphics also.
This is how it sits today needed a restoration, I raced it for about 15 years myself.
Mikes Reply:

I have seen that car over the years scouring the internet for info. Very Popular, you must be proud!

  #82  
Old 05-13-2022, 04:52 AM
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Like this? couldn’t resist showing it off, was driving it last night, man it’s a nice set up.
Mikes Reply:

That is a nice set up, I was thinking of the one Tom S. is working on as a Reproduction, a 1963 Tunnel Port, I think? This one in your car is the lower Tunnel Port I guess, maybe you can explain the difference since I am new to the 421 Tunnel port. I myself use 1966 Tri-power Rochester's.

  #83  
Old 05-13-2022, 06:46 AM
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Mikes Reply:

That is a nice set up, I was thinking of the one Tom S. is working on as a Reproduction, a 1963 Tunnel Port, I think? This one in your car is the lower (low rise) Tunnel Port I guess, maybe you can explain the difference since I am new to the 421 Tunnel port. I myself use 1966 Tri-power Rochester's.
I am showing the 421 SD Tunnel Port, next I will supply some photos of the only Reproduction known to Pontiac Fans from PY Tom S. for those who are not familiar with the project, it goes on now and you can still buy one.
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  #84  
Old 05-13-2022, 06:54 AM
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Mikes Reply:

Tom S., began this project and is now working, with others, to finish this short run of the 1962 - 63 Tunnel Port Intakes 421 ci SD, there are two versions one early and one later for say 67-70's. Here are the prototype patterns as they are being made on a Lazor printer:

If you want one, you'd better let me know and I will pass on the word! Option is directly PM Tom S. on PY forum.
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Last edited by TRADERMIKE 2012; 05-13-2022 at 07:04 AM.
  #85  
Old 05-16-2022, 06:34 AM
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Mikes Reply:

I have seen that car over the years scouring the internet for info. Very Popular, you must be proud!
Mikes Reply:

From a value point for resale, I would keep the Ram air 5 in it to increase the overall value? JMO

See my other Threads for a photo of your car.

  #86  
Old 05-16-2022, 09:46 AM
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Mike,get your description right.We are building D port Tunnel RAMS!Not Tunnel PORT.Tom

  #87  
Old 05-16-2022, 11:17 AM
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OK, 20+ off topic posts and counting . . . .



Two questions:

Is the “421 hole” only for iron heads or do aluminum heads need it as well?

Has anyone plugged those three holes in the head instead of tapping the block?
Seems like it would be easier, especially with aluminum heads.

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  #88  
Old 05-17-2022, 06:46 PM
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Quote:
Originally Posted by TRADERMIKE 2012 View Post
Mikes Reply:

That is a nice set up, I was thinking of the one Tom S. is working on as a Reproduction, a 1963 Tunnel Port, I think? This one in your car is the lower Tunnel Port I guess, maybe you can explain the difference since I am new to the 421 Tunnel port. I myself use 1966 Tri-power Rochester's.
Correction: "D"-Port Tunnel Rams!

  #89  
Old 05-27-2022, 05:09 PM
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OK, 20+ off topic posts and counting . . . .



Two questions:

(1) Is the “421 hole” only for iron heads or do aluminum heads need it as well?

(2) Has anyone plugged those three holes in the head instead of tapping the block?
Seems like it would be easier, especially with aluminum heads.
Mikes Reply:

Since no one has replied to your question, I read a lot on the subject on this forum and this is what I think:
(1) yes
(2) Do the Aluminum heads the same way, the holes are "not" drilled from the Manufacture, as far as I have read. It is especially important to drill the holes between the 2 Siamese Exhaust ports.

  #90  
Old 05-28-2022, 08:05 AM
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I'm detecting an altogether unnatural amount of spare time.

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  #91  
Old 05-28-2022, 08:57 AM
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I'm detecting an altogether unnatural amount of spare time.
Thread closer lol

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  #92  
Old 05-28-2022, 09:46 AM
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Maybe he just likes to type.

Tom V.

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  #93  
Old 05-28-2022, 12:18 PM
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Un subscribing

  #94  
Old 05-28-2022, 03:43 PM
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Guess this thread is done.

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  #95  
Old 05-28-2022, 04:04 PM
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Why did Pontiac add those cooling holes to the 421 SD but not to millions of regular everyday Pontiac V8s?

If it was truly beneficial why didn’t they? The added tooling and machining cost could have been a factor.

Perhaps potential long term durability issues?

The 421 SD, produced in very limited numbers mostly for racing, had no factory warranty so any failures wouldn’t end up as a liability.

I’m guessing not many Pontiac engine builders today offer that particular modification on their list of different options, maybe I’m wrong. If it was something that really made a difference everyone would be doing it.

Thread closed.

1964 421 HO block, 370 hp code 45B for manual trans, no special added cooling holes.
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