i have a 95 eclipse rs with the 420a engine in it that finally locked up on me after 211,000 miles.  i would like to swap everything out for the 4g63.  i know that the engines are literally opposite of each other.  being a gm mechanic i know that cars are built and then assembled differently such as different engine and transmissions in the same body and frame.  what i need to know is will the 4g63 bolt up to the car that ive got. i know the trans and all has to be changed but are the bolt holes there for the swap. anyone that has done this please let me know what i need to do so i can get to work on it.  all information is appreciated