Can a 86 350 Camaro engine fit 87 Chevy caprice?

No, a 1986 Camaro 350 engine will not directly fit a 1987 Chevy Caprice without significant modifications. While both are GM vehicles and use small-block Chevy engines, there are differences in the engine mounts, accessory placement, and potentially the transmission and associated components that make a direct swap impossible. You would need custom engine mounts and potentially other modifications to the engine bay and accessories.