eclipse 1.8 & 2.0 engines

I have a 93 eclipse with the gay chrylser 1.8 engine. i want to upgrade to the 2.0 setup. does anyone have any specs on both these engines? are the blocks the same dimensions? can i put a 2.0 head on a 1.8 block & b/s the block to make better compression & displacement? if anyone has any of the engine codes/specs or where to find them, it would be appreciated if you could provide info to me thanks...:eek7: