Will 1995 Chevrolet 350 intake fit a 1997 vortec heads?

No, a 1995 Chevrolet 350 intake manifold will generally not fit 1997 Vortec heads. The bolt patterns and intake port shapes are different. Vortec heads have a different port design optimized for the Vortec intake manifold. Trying to force a fit would be very difficult, potentially damaging the heads or intake manifold. You need a manifold specifically designed for Vortec heads.