A little back story: When I was looking at buying my 05 wagon, I test drove an 04 STi. If it wasn't for the blurring effect of the rear passenger, I would have bought it. About 3 years ago, my wagon went thru a major suspension overhaul which came out nicely. However, the 18x9.5 wheels didn't fit. In same garage where we were trying to fit them, there was an 08 STi with 18x9.5 wheels that fit great. Needless to say, I wasn't happy.
Then I saw this (pic for 99 to 2007). If this is possible, why can't the rear subframe for a LGT be combined with STi suspension mounting points. reading the parts manuals for an 08 STi indicates its based on the 05 LGT with a few changes.
So, how few changes? I need to find a rear subframe from an 05 LGT & one from an 08 STi. Measure them. Then find a shop to mock something up.
Attached pics of rear sub frames from 05 LGT & 08 STI