StarterFlywheelBellhousing Combinations（StarterFlywheelBellhousing组合）.pdfVIP

Starter-Flywheel-Bellhousing Combinations Tom Parsons (DZAUTO) Starting with the VERY first Chevy V8 engine (265) in 1955, ALL Chevy V8 engines (and 6cyl engines beginning in 63) have the SAME BOLT PATTERN on the back of the block. Quick example. You can remove an original V8 from a 55 Chevy, install a 1990 454 (of course use the 454 flywheel), bolt it all together and drive it away. This interchange between the back of the block of all SBs, BBs and W-motors (348-409-427 Z11 engines now I KNOW that you all know what a Z11 is, right?) and all bell housings and auto trannys is the same. In the history of the Chevy V8 engines, there have only been TWO different sizes of flywheels-big (168teeth) and small (153 teeth). Thats it, nothing else. Thus, only TWO sizes of bell housings. There have been MANY styles and configurations of bell housings, but they were still only for the big or the small flywheel. With the first V8 in 55, there was only ONE size flywheel and ONE size bell housing.Then in 63, the small flywheel and corresponding small bell housing was introduced. The EARLY flywheels, even though they were the big flywheel, only had a bolt pattern for a 10in clutch (except truck flywheels). There were no 10 1/2in clutches then (11in for big trucks). Up through 62, the starters bolted to the bell housing (63 on 409s). Some trucks also had bell housing mounted starters up to about 70. ALL bell housings that had the starter mounted to the housing were the open bottom type, as below. In 63, along with the new, small flywheel, all housings were the full enclosure type and they were alum (except some trucks as mentioned above). When the full enclosure bell housings were introduced in 63, the BLOCK MOUNTED starter was also introduced. Of course, there was an exception. Some early engines that were mated to the early Turboglide auto trannys, had block mounted starters. Otherwise,