first thing you gotta understand is that the rs/gs model eclipses are totally different than the gst/gsx eclipses.. they both use totally different motors and the way the mounts are setup in each of these cars are made speific for the engine it comes with. the rs/gs eclipses/talon come with the 420a chyrsler motor(aka a dodge neon motor for the most part with a few differences). gst/gsx uses the 4g63t mitsu motor. ok now here goes. trying to swap in a 4g63t motor in a rs/gs will be one big headache and cost you alot of money. thats just the motor swapping part. then you have to find a wrecked gsx and then buy the parts off that. like the tranny w/ transfer case, driveshaft, rear axle w/ diff, gas tank, and few other odds and ends.to save yourself this headache and throwing away all this money, get yourself a gsx shell... and or, i have heard rumors and seen pics


the evo 4g63 engine sits the same way the 420a does. it would be alot simpler to swap(from what ive seen) to swap one of those in their than 1g/2g eclipse/talon 4g63(which is basically the evo 1-3 motor except for the 6 bolt)