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Mustang Technical Discussion > Pre 1973 > Shaker Hood > Community Forums > Mustang Forum Australia - Mustang Tech

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GregC
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Hi
Just wondering if someone can shed some light as to why a 1969 Mach One with a 428 that has a Shaker Hood has the numbers 428 on the side of the Shaker and others have Cobrajet on the side of the Shaker. I am new to the additional details of Mustangs.
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GregC
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Hi
Further to my earlier post I understand I should actually be asking what is the difference between a 428 and a 428 Cobrajet in a 69 model.
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ponyride
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I'll have a stab for you. I'm far from expert on them but I suppose a 428 badge on a shaker scoop means that it has a 428 engine (or suggests that it does, it may be a faker) which may be a pre CJ motor.

Whereas the 428 Cobra Jet is different again. It's my understanding that 428s were an earlier engine (ie Police Interceptor) and the 428 CJs were developed by Bob Tasca, God bless him, in late 68.

Whether every 428 after that became a 428 Cobra jet I don't know, and whether anyone would put a non CJ 428 into a later car, ie a 69 or 70, and what the difference is between them I don't know either.

Someone here or on the MOCA forum will have the answers I'm sure.

If you're looking at one to buy, a Marti report on the car would be the very first step in my opinion.

There are a heap of sites and forums dedicated to Cobra Jets, there'd be lots of interesting reading if you want to learn the history and make up of them Greg. Sorry I don't know a lot about them other than they are a truck load of fun to drive!

Edit: I see you clarified your question, didn't see your second post.


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mert
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There were 428's pre Cobra Jet. P and Q codes dating back to '66 IIRC. Early 428's in Mustangs (67 Shelby's) were "just" 428's. (Some call them the PI, but I don't think Ford ever used this name, the PI was a 390 and not dual carbs)

Mustangs got the 428 in april '68, w/static scoop on the hood . I think these may have had got the rectangular 428 logo (but don't think so, think they may have had no 428 badging) and the script came in w/69 on the Shakers, and non-shaker 428's got the rectangular, but not 100% sure.

www.428cobrajet.org/


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cage
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68 cobra jet's had cobra jet on the bonnet scoop from memory.


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mert
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I've looked at a few 68 1/2 428's over the years, never pulled the pin on buying, but none had the script. The hood scoop was really the only external giveaway for the 428 undre the hood. Came standard with GT kit, fogs, C stripe, etc.

Pretty sure the script was first used for '69's.

Never seen an original '68 with any "428" or CJ related badge anywhere...


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69candy
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Very few if any 69 Cobra Jets had 428 on the shaker. Cobra jet script on shaker is what came from the Factory. Could be dealer installed
Have a search around here www.428cobrajet.org/
Lots of info and has been discussed
Any 69 Mach 1 with a 428 in it, was a Cobra Jet or a Super Cobra Jet , Q or R code. A few oddball speacial order cars, that were not Mach 1's had the 428
hope this helps. I'm biased. Love them


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GregC
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Hi
Thanks for your replys. I am currently looking at a 69 Mach One that is a 428 and has 428 on the shaker. So it appears they may not have referred the 428 as a Cobrajet in the 69.
Regards


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ozbilt
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GregC wrote
Hi
Thanks for your replys. I am currently looking at a 69 Mach One that is a 428 and has 428 on the shaker. So it appears they may not have referred the 428 as a Cobrajet in the 69.
Regards


Yes they did refer to the 428 as a Cobra Jet in 69 ......

The shaker is on a 428 making it "ram air" so it is an R code.



The standard scoop is a non ram air 428, so a Q code.



Both are Cobra Jets


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mert
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... except for the Super Cobra Jet R and Q codes... triggered as an automatic upgrade with the Drag Pack option or a 3.91 or 4.30 rear... the 428's cause a lot of confusion due to the variations in the different engines with the same displacement... almost, but not quite, as bad as the 390GT making many think they have a GT optioned car...


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ponyride
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GregC wrote
Hi
Thanks for your replys. I am currently looking at a 69 Mach One that is a 428 and has 428 on the shaker. So it appears they may not have referred the 428 as a Cobrajet in the 69.
Regards


As oz said, the '69 428 was most definitely a CJ.

Edit: '69 428 with ram air (shaker) as queried was most definitely a CJ. Non Ram Air is different as per oz's post. My apologies.

It could be:

1. That it is a 428 put into a non 428CJ car (as expensive as that would be).
2. It s a factory CJ but somone just wanted more bragging rights by letting the world know that there is a 428 under the shaker and put "428" on it. Cobra Jet only means something to those who know.
3. It may be a faker.

Do get a Marti report on the car as a very first step (you can get a rush email version) and brush up on identifying a 428/CJ engine. This is a good site:

www.428cobrajet.org/



As always, there are very knowledgable people on here who can help (not me BTW) and Barry (blackthunder) on the MOCA site knows the 428s/Cobra Jets extremely well. I'm not sure if Barry pokes his head in here from time to time.

If it's the car that Matt (Shermatt) posted a pic of, I'm sure he'll help school you on all these things anyway. Looks an interesting one.

Best of luck.


Rick.

Old things amuse all minds.

Last edited by ponyride on Sun Mar 10, 2013 11:53 am; edited 1 time in total

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GregC
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Hi Rick
Yes Matt has found a 69 with a 428 and a shaker hood however on the shaker it has 428 and not Cobrajet hence my confusion. I have asked him to explain for me.


Greg

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Foresight
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The code of the car is the best place to start. If it is a T code (6 cycl) for example you wouldn't even bother checking the engine because even if its a genuine 428cj engine the car would not be worth anywhere near as much as Q or R code.

If it is a Q or an R code then you can start digging further to make sure that the engine is a genuine CJ.

Basically if you are chasing a car that is "correct" this particular car would have to be an R code since it has the shaker hood. People can put on what ever scoop badges they want but you cant change the code of the car (in the VIN) unless they break the law.

The "which badge goes on which scoop?" question is as per ozbilts post.


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Lee & Q
69 428 mach 1 - Guess who...it's Q!

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GregC
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Hi
Answer to the question has been solved it is actually an M Code that had a 428 put in it about 18 years ago.


Greg

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Jiffy
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The only 428's put in a Mustang from April 68 - July 1970 by the factory were 428 Cobra Jets or Super Cobra Jets. There was never a passenger 428 or a Police Interceptor 428 fitted to a Mustang by the factory and sold as a new car.

However, very early (preproduction) '69 cars - most often those with the shaker - were fitted with either a 428 logo, a CobraJET script or both. After a very short time, in production (from August 1968 from what I understand), all CJ car's had the CobraJET script on them whether they were a Q code (no shaker) or R code (shaker) Mustang but no 428 logo.

A 1970 R-Code shaker car has the CobraJET script on the shaker and 428 stencilled on the hood (again, early production cars didn't have this stencil) but still didn't have the 428 logo on the scoop.

Other large body 68/69 cars (Fairlane, Montego, Torino etc) had 428 on the scoop as well as CobraJET - but the Mustang didn't....

Clear as mud?


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