55-56 Chevy Bellhousing
1955-56 Chevy Passenger Car Bellhousing Components
3704923
0.679 UNDERPAN, Flywheel
55-57 Pass. (8 cyl.)(exc. A.T.)
3713312 55 Pass. (8cyl.) (exc. P.G., H.T.)
3837207 56 Pass. (8cyl.) (exc. A.T.)
0.679 EXTENSION, Clutch Housing
This is a picture of a reproduction part that fits
the bellhousings listed without modifications.

839301
0.679 BOLT, w/washer, underpan and extension
57 ALL, Corvette (8 cyl.)
These bolts are used to attach the under pan and
extension to the bellhousing.
3716595 (cast 3704922)
0.683 HOUSING, Clutch and Flywheel
55-56 Pass. 8 cyl. (exc. P.G.,4BC,dual 4BC)
3755343 (cast 3733365)
0.683 HOUSING, Clutch and Flywheel
55-57 Pass. (8 cyl.)
3726574
0.796 STUD, Clutch Fork
(7/16"-20 stud w/21/32" dia. ball)
56 Pass. w 2BC (2nd design)
This ball stud would fit the casting # 3704922
bellhousing.
3729000
0.796 STUD, Clutch Fork
(13/16"-16 Stud w/21/32" dia. ball)
56-57 Pass. (w/4BC or dual 4BC)
This ball stud fits part # 3755343 (cast 3733365)
bellhousing.
3836314
0.796 STUD, Clutch Fork
(7/16"-20 thd. w/11/16" ball)
55 Pass.
57 Pass (exc. 4BC, dual 4BC)
This ball stud fits part # 3716595 (cast 3704922)
bellhousing.
3730267
0.797 BOOT, Clutch Fork
(5 1/8 O.L. at clutch hsg. face)
55-56 Pass. (6 cyl.)
3730266
0.797 BOOT, Clutch Fork
(4 11/16" at clutch hsg. face)
55-56 Pass. (8 cyl.)

Housing to Block Bolts
(5) 3/8"-16 x 1 1/4" Bolts
(2) 3/8"-16 x 2 1 1/4" Bolts
Disclaimer:
Most parts that I describe and picture have identification on or with them, others I can identify from other sources and deduction (educated guess).
Factory correct applications are your responsibility. GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Applications are for replacement parts that were available at the time of parts book printing, and when possible model specific assembly manuals.
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!