Can you put a 350 fuel injection system on carbed 305?

No, you can't directly put a 350 fuel injection system on a carbureted 305. While both are small-block Chevrolets, the intake manifolds, fuel rails, sensors, computer, and wiring harnesses are completely different and incompatible. The 350 fuel injection system is designed for the 350's specific fuel delivery needs and engine management parameters.

To successfully convert a carbureted 305 to fuel injection, you'd need a fuel injection system specifically designed for a 305 (or a generic small-block Chevy system that can be properly tuned), along with the appropriate intake manifold, sensors, wiring harness, and a compatible engine control unit (ECU). Simply trying to adapt a 350 system will lead to significant problems and likely won't work at all.