Hey guy's i have a 99 eclipse gs and i bought a jdm motor and i was wondering if that can a gst motor fit in a gs eclipse?

 

No it can't, the motor mounts are different along with so many other things just forget about it..I have a 99GS as well...well mine is turboed but anyways I just toasted my motor I think and wish it was possible but it's just not

 

I know you said it was different but what is different besides the motor mounts, because i know a place that can that can cutom fabricate anything because this person works on mitsubishi's for about twelve years and he has an evo.

 

Everything is different, trust me so many people have looked into it..ask the guy that has the evo, he will say the exact same thing

 

He said it's a possiblity that it can work but it is too complicated and might need a long time to work on it.

 

and i don't need the transmission i just want the motor

 

You will have to replace the transmission if you get the motor..remember, a 4g63 is mitsubishi...a 420a is chrysler

 

what is the difference between the two?

 

A huge difference, everything..just type in 4g63 and 420a in a search engine and you will see, if you don't know the difference between the 2 there is no way you should even look into doing the swap, TOTALLY different motors....everything is different, I believe the sub frame is even different, I may be wrong on that one though

 

I've never researched this swap, but figure on
new ecu
new wiring harness
custom wiring work
new mounts, maybe subframe, maybe modification to the firewall, shock towers, anything really- it's far from a bolt in, I'm not sure on what all needs to be done
-new tranny, the engine, new exhaust, new radiator (probably), new axles, might even need new hubs/front suspension (not sure on that one)
-intake piping, intercooler piping, maf, have to get the power steering to interface which means at the least custom lines, maybe the same for the AC, fuel pump, fuel filter might not be in a compatible location- might need all new lines from the tank

The list goes on and on. I know little about 2g cars, especially nt's, but these are the things I came up with off the top of my head that might be different. It's a nightmare project and far from worth it. If you want a turbo NT, turbo the 420. If you want a 4g63, buy a car that comes with one.