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The term CJ or Cobra Jet was applied by Ford for their better versions of an engine. In the case of the Mustang I would rank the 351 CJ version just behind the HO version. It did change from 71 to 72 and Ford dropped the designation sometime in 1972. I have one of the 330 1972 CJ automatic verts built. When I ordered the Deluxe Marti he does state the car has a CJ 351.
I was cruising down ebay over the weekend during all our rain storms and noticed that nearly every ad for 1973 Q code convertible said it was a CJ or Cobra Jet which never was. My 1973 Q code Mach 1 has no reference to CJ or Cobra Jet in the advertising, window sticker and the air cleaner just states 351 4-V.
So I had sent a note to one of the sellers located in Charlotte. The car is on consignment and also has incorrect wheel covers they say are original. The dealer came back and connected me to an article in Hemmings saying that the CJ was still around in 73. They are basing this on the fact that it shows in the Ford repair manual showing that a Mustang Q code is a CJ. So I went to check the Ford manual and sure enough the Ford service manual does have a chart showing the Q code mustang as being a CJ. But while checking the manual it also lists the HO 351 as being in 1973 also. There was discussion at Ford of having an HO model but it got cancelled. So that is how one dealer is backing up their claim that the 1973 Q code 351 is a CJ or Cobra Jet.
If you order a Marti for 1973 Q code it only says 351 4-V like all the other Ford documents but the repair manual states CJ.
We all know errors are all over the Ford documents. The parts books list some of the parts for the Boss 302 in 1971 model. They did have two that were used for testing and Ford changed the engine in one to a 351 H code and sold it. Marti did verify that that car had two different configurations and of course Bob Perkins owns it currently with a pile of the Boss 302 parts for the 1971 he located.
So I cannot argue with the people selling the car as a Cobra Jet based on their stand that the Ford service manual shows that. Even though the 73 351 Q 4-V falls way short of the 72 Q CJ version.
Here is copy of what their reply was with link to the Hemmings article.
David,
Thank you for reaching out to us regarding the 1973 Ford Mustang. While our consignment customers give us information (some good, some not so good) we also try to do research ourselves. We want to be able to identify vehicle models as best we can.
This article explains as to why we are listing it as we are. It is simply because the motor is/was considered a Cobra Jet until 1974.
https://www.hemmings.com/magazine/mus/2010/02/Last-of-the-Hot-Rods---1973-Ford-Mustang/2721881.html
I was cruising down ebay over the weekend during all our rain storms and noticed that nearly every ad for 1973 Q code convertible said it was a CJ or Cobra Jet which never was. My 1973 Q code Mach 1 has no reference to CJ or Cobra Jet in the advertising, window sticker and the air cleaner just states 351 4-V.
So I had sent a note to one of the sellers located in Charlotte. The car is on consignment and also has incorrect wheel covers they say are original. The dealer came back and connected me to an article in Hemmings saying that the CJ was still around in 73. They are basing this on the fact that it shows in the Ford repair manual showing that a Mustang Q code is a CJ. So I went to check the Ford manual and sure enough the Ford service manual does have a chart showing the Q code mustang as being a CJ. But while checking the manual it also lists the HO 351 as being in 1973 also. There was discussion at Ford of having an HO model but it got cancelled. So that is how one dealer is backing up their claim that the 1973 Q code 351 is a CJ or Cobra Jet.
If you order a Marti for 1973 Q code it only says 351 4-V like all the other Ford documents but the repair manual states CJ.
We all know errors are all over the Ford documents. The parts books list some of the parts for the Boss 302 in 1971 model. They did have two that were used for testing and Ford changed the engine in one to a 351 H code and sold it. Marti did verify that that car had two different configurations and of course Bob Perkins owns it currently with a pile of the Boss 302 parts for the 1971 he located.
So I cannot argue with the people selling the car as a Cobra Jet based on their stand that the Ford service manual shows that. Even though the 73 351 Q 4-V falls way short of the 72 Q CJ version.
Here is copy of what their reply was with link to the Hemmings article.
David,
Thank you for reaching out to us regarding the 1973 Ford Mustang. While our consignment customers give us information (some good, some not so good) we also try to do research ourselves. We want to be able to identify vehicle models as best we can.
This article explains as to why we are listing it as we are. It is simply because the motor is/was considered a Cobra Jet until 1974.
https://www.hemmings.com/magazine/mus/2010/02/Last-of-the-Hot-Rods---1973-Ford-Mustang/2721881.html