* Specific Transmission: Not all transmissions are created equal. While the bolt pattern matches, the transmission itself needs to be compatible with the torque and horsepower output of the 350. A 350 produces significantly more power than a 305, and a transmission not designed to handle that extra power could be damaged or fail prematurely.
* Year and Model: The year and model of the transmission and engine also matter. There can be variations in bellhousing design even within the same engine family across different years. You need to ensure compatibility between the specific years of the engine and transmission.
* Modifications: Depending on the specific transmission and its condition, you might need an adapter or modifications for a perfect fit.
In short: While physically possible, it's not a guaranteed perfect fit. Thorough research and potentially consultation with a mechanic specializing in these engines and transmissions are necessary to ensure a safe and reliable installation. You need to identify the exact transmission model and ensure it's appropriately rated for the 350's power output.
