Which engines will work?
 

I'm planning on replacing the engine in my 2004 Mazda3. It's the sports edition, with the 2.3 liter engine and automatic transmission. My question is, which engines will swap easiest? Obviously another identical model would match perfectly, but what other model years of the Mazda3s would work? Would another 2.3 from another model work?
Thanks for any help!

If nobody knows the answer to my question, maybe someone could point me in the right direction to where I can find the answer?
Thank you.

Thanks for the help, guys....:wtf: