I didn't have any trouble getting my fenders off. Mike D tells me that, with my rust, mine won't hold up in an accident, so you may want to consider that when making your decision. You will never know the extent of the rust until you remove all the undercoating/insulation. Looks like you may have as must floorpan rust as me from that third picture.

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1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition