and wanted to build a badass sleeper.. what would it be ?

im not talking the generic "put a 350 in a fc!!" ...... what kind of crazy stuff can you put together to make a complete sleeper on the streets.. the less money you spend the better.. i know this might be hard for some because they like to own pretty cars .. but forget looks . design something that can perform .

im leanin on the idea of a subaru driveline in a 95 escort gt ..