I have the option of picking up a very low mileage 2004 engine and transmission unit as a spare at a good price, but it a stick and my car is an automatic. I know the engine/trans is from a 2004 car also, but not the month it was made. My car is from the summer of 2003.

How different is the engine? Is it a matter of just exchanging the stick trans flywheel for the aurto trans flexplate on my existing engine? I have seen in some other cars (rare instances) where the actual crankshaft is different, or something else is a major pain, and the installation is not worth the hassle (making it best to look for an original A/T engine).

Also, anybody need a spare stick transmission? Make 'ya a deal