Hey, thanks for taking the time to read my question.... 
  
NUTSHELL: 
I've got two subaru loyales, one with a beat up body but ok engine, one with a blown engine but straight body. How hard would swapping the good engine into the good car be?  
  
  
DETAILS: 
-The engine info stickers show them to be the same (1.8L tbi) and they look the same, and the two cars are same make, model, and within 2 years of each other in manufacture. 
  
-I am a pretty good shade-tree mechanic. Last summer I stripped my 4runner's engine totally down for new gaskets and timing chain. When I put it back together it ran on the first try. 
  
I've never cracked a block, but from the book this looks pretty simple: undo the fuel and air lines, electrical, and exhaust, then unbolt the engine from the tranny and hoist it out. Reverse process for the other engine.  
  
SPECIFIC QUESTIONS: 
How long should I budget for this?  
Is there anything I should look out for, or any reason I shouldn't try it?  
Is there any possibility the good engine might not swap in, even though it looks the same and has the same underhood sticker/model#?