Will a 95 v-6 engine fit in a 91 Chevy g-20 van?

Yes, a 1995 V6 engine can fit into a 1991 Chevy G-20 van, but it may require some modifications. The engine mounts, wiring harness, and possibly the transmission will likely need adjustments to ensure compatibility. Additionally, you should check for any differences in engine management systems and emissions regulations that might apply. Overall, while it's feasible, careful planning and potential custom work will be necessary.