Forum Index => The Library => Topic started by: Reggie on December 25, 2007, 21:43:49
Title: Transmissions: Slant 6 vs Small Block vs Big Block Torqueflites
Post by: Reggie on December 25, 2007, 21:43:49
Torqueflites - Slant 6 vs Small Block vs Big Block
Below is a picture showing the differences in the bolt patterns and starter locations for the slant 6, small block and big block Torqueflite transmissions.
Torqueflite bellhousings and bolt patterns are specific to each engine family. In other words - slant 6 Torqueflites will only bolt to slant 6 engines, small block Torqueflites will only bolt to small blocks, and big block Torqueflites will only bolt to big blocks.
Slant 6 Torqueflites came in both the A-904-G series and the A-727-G series. Before the A-727-G series Torqueflites became available, heavy slant 6 fleet cars were produced for a few years with small block A-727-A Torqueflites that used special adapter plates to mate them to the slant 6 engines.
Small block Torqueflites came in both the A-904-A series and the A-727-A series.
Big block Torqueflites came in only the A-727-B series.
Although big block 727s and small block 727s to not interchange between engine families, the internal parts do interchange depending on the years.
All Torqueflite valve bodies will physically interchange, regardless of the engine family, but they are calibrated differently.