Will a 283 intake manifold fit on 305 Chevy engine?

No, a 283 intake manifold will not fit on a 305 Chevrolet engine. Despite both being small-block Chevrolet engines, the 283 and 305 have different bolt patterns for their intake manifolds. The 283 uses a two-bolt pattern, while the 305 uses a four-bolt pattern. Therefore, a 283 intake manifold will not properly bolt onto a 305 engine and will not create a proper seal. To install an intake manifold on a 305 engine, you will need to use an intake manifold specifically designed for the 305 engine which has the correct bolt pattern and port alignment.