After doing some searching myself, I find that there's some good info out there among the Subie sites on swapping newer Suspension components into older Subies.
I'm looking to swap out my city beaten 98 GF8 suspension, so I've done some info gathering and have come up with a pool of useful links for your typical GC8 or GF8 swaps.
Maybe you'd like a lift for trail trekking, nab some Fozzie struts (Forester). Most Subie compents will bolt up, if not with some coaxing.
I'd like to hear from some members that have done these kinds of swaps themselves, on what worked out for them and what didn't.
Ideally, I'd appreciate a first hand account of the work and end result.
http://forums.nasioc.com/forums/showpost.php?p=18820009&postcount=7 General info on modifying the suspension on 93-2001 Impreza's of all trims
Which came from this "will this suspension part fit my x Subaru?" http://forums.nasioc.com/forums/showthread.php?p=18820009#post18820009
http://www.ultimatesubaru.org/forum/topic/118004-the-unofficial-how-to-lift-your-impreza-thread/ the-unofficial-how-to-lift-your-impreza-thread
http://www.rs25.com/forums/f105/t70898-diy-strut-spring-install-pics.html diy-strut-spring-install
http://forums.nasioc.com/forums/showthread.php?t=1589951 Assembling front strut
http://bbs.legacycentral.org/viewtopic.php?f=6&t=45743 Info on Legacy strut top hats and springs, needed to fit GD WRX rear struts into a GC8/GF8 (at least that's one route)
http://www.rs25.com/forums/f9/t109573-forester-struts-impreza-gc8.html forester-struts-impreza-gc8
http://forums.nasioc.com/forums/showthread.php?t=2279833 What USDM Springs/Struts Will Fit a JDM '94 GC8?
http://www.rs25.com/forums/f24/t96397-04-wrx-suspension-into-gf8.html
http://forums.nasioc.com/forums/showthread.php?t=1980173 GD suspension on a GC
http://www.rs25.com/forums/f9/t200479-02-wrx-front-struts-l-rear.html Saggy rear, wrx front struts and stock rear struts
http://forums.nasioc.com/forums/showthread.php?t=1429052 Trailing link install tutorial