Just a note in case you've overlooked it (Like I did) The underside of the Subaru hood has a diagram of how most of the vacuum hoses attach. Mine is still easily readable even after 23 years.

 

Roo builders recently rebuilt my carburetor and even sent me drawings for the vacuum hoses but I couldn't quite grasp the drawings. I brought the subaru to a friend to look at the vacuum hoses and he commented that GM cars have diagrams printed on the front part of the engine compartment. Suddenly a light went off and I looked up and saw a pristine looking diagram of the vacuum hoses.

 

The diagram is easily viewable but with the hood up it's just something I just kept overlooking. Usually I am drawn to the carburetor and the hoses and not the darn underside of the hood.

 

If you ever decide to replace your hood with one from the junkyard make sure it has the identical diagrams as the hood you are replacing(there's also one for engine timing and tuning).

same goes for the timing info, some years may call for a different settign for the same setup

 

25 deg tdc for earlier turbos and 20 deg for later turbo and all spfi