64-66 Skylark Bellhousing
1964-66 Buick A Body Bellhousing & Related Parts
13633732
0.679 COVER, Lwr.
64-67 225-300-340 Eng. C.T. (Buick Parts Book)
1372374
0.679 COVER, Flywheel
65 Skylark G.S. (Buick Parts Book)
66 46-6000 C.T. (Buick Parts Book)

9774035
0.683 HOUSING, Flywheel upper
64-67 225-300-340 Eng. C.T. (Buick Parts Book)
1373726
0.683 HOUSING, Flywheel upper
66-67 400 Eng. C.T. (Buick Parts Book)
1363719
0.795 YOKE, Clutch release
64-67 Special-Skylark C.T. exc. G.S. (Buick Parts Book)
1352404
0.795 YOKE, Clutch release
64-66 Skylark, Gran Sport-Wildcat C.T. (Buick Parts Book)

3729000
0.796 STUD, Clutch release fork ball
64-66 225-300-340 Eng. C.T. (Buick Parts Book)

3993851
0.797 BOOT, Clutch release yoke
64-66 Special-Skylark C.T. exc. Gran Sport (Buick Parts Book)
1357843
0.797 BOOT, Clutch release yoke
64-66 Skylark, Gran Sport-Wildcat C.T. (Buick Parts Book)
1367058
0.799 BEARING, Clutch release
64-66 Skylark G. S. & Wildcat C.T. (Buick Parts Book)
13633732
0.679 COVER, Lwr.
64-67 225-300-340 Eng. C.T. (Buick Parts Book)
1372374
0.679 COVER, Flywheel
65 Skylark G.S. (Buick Parts Book)
66 46-6000 C.T. (Buick Parts Book)
9774035
0.683 HOUSING, Flywheel upper
64-67 225-300-340 Eng. C.T. (Buick Parts Book)
1373726
0.683 HOUSING, Flywheel upper
66-67 400 Eng. C.T. (Buick Parts Book)
1363719
0.795 YOKE, Clutch release
64-67 Special-Skylark C.T. exc. G.S. (Buick Parts Book)
1352404
0.795 YOKE, Clutch release
64-66 Skylark, Gran Sport-Wildcat C.T. (Buick Parts Book)
3729000
0.796 STUD, Clutch release fork ball
64-66 225-300-340 Eng. C.T. (Buick Parts Book)
3993851
0.797 BOOT, Clutch release yoke
64-66 Special-Skylark C.T. exc. Gran Sport (Buick Parts Book)
1357843
0.797 BOOT, Clutch release yoke
64-66 Skylark, Gran Sport-Wildcat C.T. (Buick Parts Book)
1367058
0.799 BEARING, Clutch release
64-66 Skylark G. S. & Wildcat C.T. (Buick Parts Book)
907588
0.799 BEARING, Clutch release
64-67 225-300-340 Eng. C.T. (Buick Parts Book)
0.799 BEARING, Clutch release
64-67 225-300-340 Eng. C.T. (Buick Parts Book)
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, 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!