The 400 Turbo transmission is a 3-speed automatic transmission that was produced by General Motors from 1964 to 1981. It was widely used in various GM vehicles, including cars, trucks, and vans, and it was known for its durability and reliability.
To connect the 400 Turbo transmission to the 350 4-main engine, you will need to use an appropriate transmission adapter or bell housing. The adapter or bell housing will serve as an interface between the engine and the transmission, ensuring that the transmission mounts properly and that the input shaft of the transmission aligns correctly with the engine's crankshaft.
It is important to note that there may be some variations depending on the specific year and model of the engine and transmission involved, so it is recommended to consult with a knowledgeable mechanic or refer to the manufacturer's specifications to ensure compatibility.