351 c cobra jet

quickstang91 · 11-05-2009, 03:48 PM

Was curious if anyone new anything about these 70 71 model 351 clevland cobra jet motors and if they are worth anything?

Kato Engineering · 11-07-2009, 02:00 AM

dunno why you call it that...

there is a specific site that gives details of the actual cobra jet block / compression and heads..
along with details and other parts ( dampener & intake) in the engine that was different in the legit BOSS 351...
the 1970 heads were a closed chamber design...
in 1971, the heads were an open chamber design...
at some point in time the "name" / "moniKer" was changed to a "HO" with the open chamber heads.

96 DOHC · 11-07-2009, 06:02 AM

The ONLY 351C CJ I've ever seen was in a 72 Torino.

quickstang91 · 11-07-2009, 11:52 AM

Yea all I know is the guy said it was a cobra jet motor.... The valves and crap are GIANT! i was just trying to dig up sum info thanks fellas

Kato Engineering · 11-07-2009, 10:22 PM

If you HAVE IT,

then ,
take it apart and see what is inside.

the issue is that most that have a cleveland of some type,
think that THEIRS is a cobra jet or a boss 351...

when they AINT.

WILDCOBRAR · 11-10-2009, 12:56 PM

I pulled a 351CJ out of a 1971 Totino with all the snake badging. The breather had 351 CJ right on it. Top was chrome and the bottom was dark Ford Blue. Had open chamber 4V heads for a hydraulic cam and a 4 bolt block. Otherwise, in my opinion, nothing special. Though anyone who knows something about Clevelands, knows the potential they have.

Joe

Kato Engineering · 11-12-2009, 01:24 AM

I am not usually very nit pickey about this,...
...but the PROPER actual moniKer / term as used by ford originally should be adhered to....
most of this is out of my BRAIN,..and not out of some refrence manuall.
1970 was a closed chamber head cleveland. ALL were sold as a hydraulic flat tappett cam setup. spread bore and a square bore holley available.
1971 was sold as a BOSS 351..closed chamber head....with a solid lifter flat tappett cam setup along with at least two carb and intake setups..
1971 was also available as a open chambered head and a flat tappett cam.in the regular everyday common station wagon and mustang ETC...
1972 was open chamber head/hydraulic flat lifter setup...some were called H.O. and some were called C.J....

all model years parts can be interchanged from year to year...and after 30 some odd years ...many parts have been changed from engine to engine and because pof this, you really do not know what it really is untill it is torn down... originallality or whatever really does not matter since you can CREATE or MAKE it any number of different ways and no one can really know what is inside unless it is torn down...
so, WHO CARES....

73Pantera · 11-13-2009, 07:09 PM

Hmm, now an oldster, I bought "back in the day" a 1971 Torino 2dr coupe with a bench seat, 351C, 4spd. 10.7:1 compression. Just assumed it was closed chambered heads. Never took the motor apart. Cool car for a kid learning to powershift.
Now as an oldster, have a 1973 Pantera that came with a (I believe) Cougar code HO 351c. Less compression by 1973, open chamber heads. Sitting on a dolly in the corner, replaced with a 10+ CR 373 Cleveland, closed chamber heads, stroked, looong Roush nascar rods, head intake floors raised, etc. Runs good in a car with the frontal area of a big jetski.

Kato Engineering · 11-14-2009, 02:15 AM

the common pantera setup was not allways a closed chambered head....
most were actually 1972 and up year code actual heads.even if the body vin was earlier or different......mangustas etc...
but after working on at least 50 of them...I have deduced that at least half of the heads were either replaced or altered in some form for the owner.
there was a day that all of the pantera owners were in "private one -up- manship" to boast more power or speed than another..and a lot of this was started by the pantera shops in southern calif. just to build up business...
we did in fact build a number of high compression open chambered headded clevelands.
a number of these also had a complete festoooned setup of various nozzles and lines to run a multiple setup of nawwwsssss... most owners never even turned the bottle on.

BTW
there were a number of "back-to-the-future" type of deloreans that had clevelands in them too.
...and dont forget about the BRICKLIN.....

8950HO · 11-14-2009, 10:59 PM

I`m pretty sure the reason they were called cobra jets is because they came with a hydraulic cam that had the same specs as the 428CJ.

I had one in a 72 Mach 1.
It had the open chamber heads,4 bolt main block and a pos Motorcraft spreadbore carburetor.

Custom Diffs · 11-15-2009, 08:26 AM

I am restoring a 1973 Mustang and I need a 351 Cleveland,,wanna sell it?

Kato Engineering · 11-15-2009, 12:50 PM

cobra jet is a much too many times overused moniKer that is most often given to a common engine by someone that wants to ill represent an engine to a prospective buyer that does not really know the difference.