Why go with an older 2.2L ? They are getting old even if yes, they are built
like a tank. But you can find cheap 2.5L SOHC if you look around.

Any older engine will need basic work, by re-seal i mean new seal everywhere
including head gasket, on top, every timing components (T-belt, idlers,
tensioner...) need to be replace. Cam/crank seal, cam plug, piston pin
access port behind flywheel.

http://www.benplace.com/subaru25/25inside1.WMV

Ben