Any 64-67 Buick A-body with a 300-340 engine and 4-speed set-up would work for you. The clutch pedals and linkage would work fine for you, and they would even have the correct solid driveshaft. The bell crank for the pedals on the 67 is a little different, but it should work. The 68+ Buick A-bodies with the 350 would have the correct bellhousing, clutch and trans, but the linkage would need to be adapted, the driveshaft length changed and the pedal system is different. Olds and Pontiac had the starter on the left so the bell housing is not clearanced for the starter on the right. Although they have the same bolt pattern they will not interchange with the Buick (unless the rare universal bellhousing was used). Chevy has a different bolt pattern all together.
------------------
Steve B.
GSCA #2173 (1986)
67 GS 525 Stg IV
66 GS Convertible
65 GS HT
63 Riv