Intake Manifold Identification - 12/02/19 09:19 PM
Folks
My intake casting is 8784234.
What's that identify?
My intake casting is 8784234.
What's that identify?
Re: Intake Manifold Identification - 12/03/19 04:40 AM
Probably a casting set-up error. The "8s" should have been "9s". Is you car a late '68 build or a '69? No QA ISO 9000 back then.
Stamping and printing errors in coins, bills and stamps are worth a lot. Maybe in intake manifolds too.
Early '68s used a 9790140 intake manifold.
Late '68s used the 9794234.
Here's a similar discussion from 2013 where one had the numbers, 3784234: 68 400 4 speed intake casting number
And a PY discussion where a guy had a 8784234: Cast Iron Intake 8784234
Stamping and printing errors in coins, bills and stamps are worth a lot. Maybe in intake manifolds too.
Early '68s used a 9790140 intake manifold.
Late '68s used the 9794234.
Here's a similar discussion from 2013 where one had the numbers, 3784234: 68 400 4 speed intake casting number
And a PY discussion where a guy had a 8784234: Cast Iron Intake 8784234
Re: Intake Manifold Identification - 12/03/19 03:16 PM
It sure is weird. I cant find anything on 8784234....everything indicates 979 like you say.
She was built early in 68 though...i have the original invoice and build sheets... April-May 1968. There are casting numbers on the block that have julians that if I read them right seem to agree with the purchase date.
I'm puzzled by the 878 though....
 3-14-68.jpg "400 block casting date stamp (C148) 3-14-68.jpg")
She was built early in 68 though...i have the original invoice and build sheets... April-May 1968. There are casting numbers on the block that have julians that if I read them right seem to agree with the purchase date.
I'm puzzled by the 878 though....
Re: Intake Manifold Identification - 12/03/19 03:19 PM
I think C148 is March 14, 1968...
Re: Intake Manifold Identification - 12/03/19 03:52 PM
The production year for the '68s was about 8/67 to 6/68 so yours could be considered a later '68 build.
The "The Definitive Firebird & Trans Am Guide 1967-1969" by Rocky Rotella has a section about the '68 intake manifolds. It mentions, "The earliest date for the 9794234 manifold has been March 25, 1968 (C258)". It goes on the imply that that date may be the earliest 9794234 found. Rotella says that the drawings for the 9794234 indicate that it was designed in Feb. 1968.
Your '68 must have one of the first castings.
The "The Definitive Firebird & Trans Am Guide 1967-1969" by Rocky Rotella has a section about the '68 intake manifolds. It mentions, "The earliest date for the 9794234 manifold has been March 25, 1968 (C258)". It goes on the imply that that date may be the earliest 9794234 found. Rotella says that the drawings for the 9794234 indicate that it was designed in Feb. 1968.
Your '68 must have one of the first castings.
Re: Intake Manifold Identification - 12/03/19 08:07 PM
Does it mention an 8784234 in the book anywhere?
Do I understand then, assuming the 878 was intentional, if mine was cast on March 14 they were using 8784234 until 11 days later when (theoretically) they switched to stamping 979.. So I could have the new 979 casting mis-stamped, or the last of the 878's?
Doesnt matter really, other than would make another cool page in the story of this bird...
I'll have to find that book...
Do I understand then, assuming the 878 was intentional, if mine was cast on March 14 they were using 8784234 until 11 days later when (theoretically) they switched to stamping 979.. So I could have the new 979 casting mis-stamped, or the last of the 878's?
Doesnt matter really, other than would make another cool page in the story of this bird...
I'll have to find that book...
Re: Intake Manifold Identification - 12/03/19 10:13 PM
8784234 is not mentioned. That 3/14/68 date is the block? What is the date code of your intake manifold?
Re: Intake Manifold Identification - 12/04/19 02:31 PM
Thx Jim-
Where's the date code on this manifold? I only see a "GM1" and the firing order stamp... That code C148 is on the block next to the distributor port.
This is the only other decent pic of the intake.... I'll need to look around on it...
Where's the date code on this manifold? I only see a "GM1" and the firing order stamp... That code C148 is on the block next to the distributor port.
This is the only other decent pic of the intake.... I'll need to look around on it...
Re: Intake Manifold Identification - 12/04/19 03:05 PM
Next to the thermostat housing/coolant hose and under the fuel line.
Re: Intake Manifold Identification - 12/11/19 06:17 PM
Very bad shape casting, but looks like it might be C2 "?" 8... maybe a "1" so March 21, 1968?
But I got I real close last night and I think I'm wrong... starting to look more like a typical 9794234, not 878... Hope I didn't waste anyone's time...
But I got I real close last night and I think I'm wrong... starting to look more like a typical 9794234, not 878... Hope I didn't waste anyone's time...
Re: Intake Manifold Identification - 12/15/19 04:23 PM
not to change the subject but put double springs on your throttle cable or your going to have a bad day, that spring looks tired
Re: Intake Manifold Identification - 12/18/19 04:23 PM
Thx Bart-
I confess the picture is from a while back. It was just a good view of the number. A lot has changed since then, including a new spring! But thx for looking out for me!
I confess the picture is from a while back. It was just a good view of the number. A lot has changed since then, including a new spring!
But thx for looking out for me!