The Chevy "606" bellhousing is a 153 tooth (10.5") aluminum bell with a 4-5/8"
center hole. It has no provision for a z-bar stud.
There are two styles of the "606".
One version is unique to the GM A&G body cars of the 1978-87 era with Chevrolet engines.
The other version is similar to the 3840383 and in fact has the #383 on the inside.
The exterior of the two clutch housings are identical, except for the transmission mounting face, where the Fork Ball Stud is lowered 1/2".
Front View
The Clutch Fork Stud is 1/2" lower on the 78-88 A & G body bell housing and has 606 molded into the stud boss. The other version has the stud in the "normal" position and 383 molded into the stud boss.
NOTE: The G body version can only be used with the part # 14007356 clutch release fork.
This picture shows the clutch fork ball stud locations, which are the only differences between the two bells. The bell housing on the right has the lowered ball stud position and is for G Bodies. The Clutch housing on the left is a replacement for a 3840383 or 3858403 bell.
Applications per the 1976-1981 Chevrolet parts catalog
| 78-80 | A (305) W/M.T. |
| 79 | A (267) W/M.T. |
A= Malibu, Malibu Classic, El Camino and Monte Carlo
Applications per the 1976-1981 Oldsmobile parts catalog
A=Cutlass Note: The 305 cubic inch engine is a Chevy engine this housing will not bolt up to B.O.P. engines.
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 and 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!
