Hi all, I'm new to this forum and I'm coming to you for a bit of insight before I dwell into the abyss. I have the opportunity to throw a 2.5L Ecotec from a 2013 Malibu (6k miles) into a 2005 ION that has a 2.2L Ecotec (200K miles) currently in it. I know the 'puters will NOT be compatible and I am sure my instruments will not work either. The Gauges I can do custom with Autometer aftermarkets.
What I need to know is if the blocks are the same?
Will the 2.5L bolt up to the current 2.2L mounts?
Will it bolt up to the Automatic Transmission? or
Do I need to use the auto transmission from the 2.5L? If/So
Will the A/T from the 2.5L fit in the ION?
Can I use Megasquirt to tune the 2.5L as a stand alone?
Anything else you might think to help or have me avoid will be appreciated.

Thanks