['13 Subaru Legacy 3.6R Limited.]

Not sure what you mean by turbos, because the 3.6r is definitely NA.  Performance chips are useless, so I'd recommend avoiding them.   If you actually want to make it faster, look at an intake upgrade, exhaust, and suspension.  If you want something that you can get a lot of power out of though, you should really be looking at an STI.  

 

Do not put a spoiler on it, please.  The subie never did anything to you, why cut holes in it?

[Engine/trans install]

There's a bracket on the passenger's side rear of the motor that has a large hole in it.  I've always used that and a one of the holes under the AC compressor.  If you're going with a leveler (highly recommended) then you'll have to find another point on each side to attach a chain.