From the FAQ at the top-
"Is it possible to swap a 4G63 into my RS/GS eclipse?
Anything is possible, but this is not practical. There will be a lot of custom fabrication needed and the motor mounts will not match up. You are probably better of just buying a turbo'ed DSM."

Short version- the 4G63 doesn't fit unless you have a GS Spyder (convertible). You need to rebuild the engine that's in there or find another from a 95-99 non-turbo.