OK, you made me go the
our website.
There are 5 different 1967-73 small block manual transmission bell housings. (There is a mention of another one, but I haven't found it yet.
1.
C5DA-6394-A - Bellhousing for the 157 tooth flywheels. This is a 6 bolt bell-housing.
2.
C5AA-6394-B - For use with 164 tooth flywheels. For use with all 1968 302 engines and 1969 - 1970 Boss 302 Eliminators. Cast aluminum construction.
3. C5TA-6394-A For use with any 351 Windsor or 351 Cleveland engine for the years 1969 and 1970. Cast iron construction, for use with 164 tooth flywheels.
4. D1TE-6394-AA - Correct for 1971 only, all 351W and 351C. Ford part number D1TZ-6392-A, for use with 164 tooth flywheels.
5. D1TA-6394-AA - Correct for 1972 and 1973 only. 351-2V and 351-4V engines were the only offerings for 1972 - 73. Ford part number D1TZ-6392-C, for use with 164 tooth flywheels.