G M, A & G body clutch fork,part number 14007356.

General Motors Part # 14007356

While most GM clutch release forks will physically
fit in any General Motors bellhousing. The "356"
fork is specific to 1978-87 A and G body cars an
their special bells.See462606 or 464697. Since
there wasn't many of these cars manufactured with
manual shift, and the fact that these are "wear items',
the original forks are very hard to come by. Because
of their unusual shape I personally felt they would
never be reproduced. WRONG, due to the popularity
of turning the 78-87 A & G bodies into Muscle cars,
they are now reproduced.

Original
This is a used original "356" clutch fork that I took
off of a one owner 1980 Malibu donor car. There
are two original versions (1st and 2nd designs?)

Repo
The reproduction "356" is of a different version.
Note: Members of Malibu Racing.com believe
this looks like a 1978 1st design.

Side by Side
Original is at top reproduction is at bottom.
In this view you can see the bearing retainer end
is the same.

Mine on straight edge
Center of release bearing clip lines up with the
pivot stud dimple and push rod dimple.

Repo on straight edge
Center of release bearing clip lines up with the
pivot stud dimple and push rod dimple.

Compare
Both forks installed in "606" Bellhousings with
Muncie cases and throw out bearings attached.

Original
This view shows clearance of fork hole.

Repo
The reproduction clears the bellhousing!

Side by Side
You can see that from fork hole to the push rod
end is different.

Original

Close up of Repo
With the throw out bearing installed the fork rides
up and down (in and out attached to engine) nice.
Due to the lowered fork pivot stud on the Chevrolet
462606,464697,and B.O.P. 563441 this is impossible
with a common straight clutch release fork.

Applications per the 1976-81 Chevrolet Parts Catalog

0.795 FORK, Engine Clutch Release
78-81 A W/M.T.

Applications per the 1976-81 Oldsmobile Parts Catalog Effective July,1987

0.795 FORK, Engine Clutch Release
78-81 A W/M.T. (V8)
78-81 A (6cyl)

1976-1981 Buick Parts Catalog Effective July,1987

0.795 FORK, Engine Clutch Release
78-81 A

Disclaimer:

Factory correct applications are your responsibility. GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Application charts are for replacement parts that were available at the time of parts book printing.
My observations come from the parts I have in my collection or other reliable sources your parts may differ.
If Factory correctness is your goal, do more research, join car clubs,
forums and buy an assembly manual if one is available for your Project Car (you wont be sorry).
This is a fun and interesting part of the hobby!