What v6 or bigger engine will fit in a 2000 chevy metro?

I have a 2000 chevy metro. I am planning on doing some custom work to it whenever I purchase another vehicle. I have heard of people putting a v6 engine in a metro. I would like to drag race this car or make it a show car. If you could help in any way I would appreciate it.|||YOU MUST BE HITTING THE CRACK PIPE|||We can put a chevy small block in it. We have put them in Rangers, a Nova, and currently in an eclipse.