crown vic engine in a mustang

Hey one of my friends is selling me his police interceptor with front suspension damage for a reasonable price. I have a 2000 mustang which have 345000 miles on it. Will i be able to use the motor mounts and cross member from the crown vic for the engine swap

No, the Mustang and Crown vic are completely different chassis. You also don't want that engine for a Mustang. It makes significantly less power than a Mustang V8.

That is a terrible idea