The Chevrolet "365" is a cast iron 168 tooth flywheel Bellhousing.
It has a 4 5/8" center hole which makes it compatible with Muncie, saginaw,
and T-10 transmissions made for GM vehicles.
This bell is listed in my parts book as Part # 3755343 with the identification # 3733365.
These covers have the starter mounted to them, and a boss with two tapped holes for a z bar mounting bracket.
This is a top view
This view shows the part # and date casting #
These covers had the part number cast into the trans mounting flange (trans must be removed to see the number), and an alpha numeric date code (mine is F 9 5).
F= April
9= 9th day
5=1955
This is an inside view
The starter mount has two 3/8"-16 threaded holes and one through
hole (bottom threaded hole is broken off on this example (common
problem with cast bells).
The transmission is attached using four
1/2"-12 threaded holes.
This view is from the bottom up
These bells take a two piece inspection cover, one is a belly pan that
covers the bottom of the flywheel and clutch assembly, the other goes
between the engine and flywheel.
The pictures below are for comparing Car to Truck bells. At first glance they are similar, but the differences are major. Not the least of which is the transmission mounting hole and motor mount provisions.
505 (left)
"365" (right)
The truck cover (left) has a 5" center hole compared to the 4 5/8 hole on the passenger car (Right)
Comparing motor mounting bolt holes
One of the major differences between the car and truck bells is the motor mount bolt holes.
With the examples I own, the car mounting holes(right in picture) are 7-1/6" and in a vertical alignment with each other (when installed). The truck bell has a 1/2" bolt hole and a pin, which are aligned horizontally ( when installed).
"365"
"505"
Applications per the 1938-1965 Chevrolet Parts Catalog, Effective October 1, 1964
0.683 HOUSING
55-57 PASS (8 cyl.)
55-59 CORVETTE...........clutch (Ident. No.3733365).............3755343
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!
