The best option would be to replace the engine with another 2.4L engine. But is you really want to put the 3.8L v6 in it, then you will have to pretty much take out all the components from the donor car. Including the engine, transmission, all the mounts, all the computers etc. And install all those components to the other car. You will also have to take out the exhaust manifolds and the piping as well.
Keep in mind on swap of this type there are always modifications that needs to be done. Which can require modification to the mounts, the exhaust etc.
I have attached engine replacement procedure for bot 2.4L and 3.8L. Keep in mind those instructions are for replacement of the same size engine.
Images (Click to enlarge)
Thursday, December 16th, 2021 AT 9:39 AM