However, there are some caveats:
* Transmission type: Make sure the transmission type is compatible (e.g., TH350, TH400, 700R4, etc.). Just because it's *from* a 350 doesn't automatically mean it's the right type for your 305.
* Bellhousing: The bellhousing is the part that connects the engine to the transmission. While the engine bolt pattern is the same, the bellhousing *might* need to be changed depending on the specific transmission and year of the engine/transmission. You'll need to ensure the bellhousing matches both the engine and transmission.
* Year of manufacture: There can be slight variations between years, so it's best to verify compatibility based on the specific year of the engine and transmission.
* Modifications: Significant modifications to either the engine or transmission could affect compatibility.
In short, while generally compatible, you need to be more specific about the exact transmission (e.g., a 1978 TH350) and the year of your 305 to ensure a proper fit. Checking the bellhousing compatibility is crucial.
