i've had a jdm v7 drivetrain in my 03 bug wagon for around 100k miles. luv it. Good fro DD and great for RX with lsd front, dccd and is buletproof. 1st is way shorter than the too long usdm 5 spd. one requirement is to fit my compomotive rally rims, so 5x100 and no brembos.
so sti 5x100, originally came with 2 pot "gravel spec" rears (same as 06 wrx) and kept my oem fronts.
highly recommend new seals all around, axles and both ends of the prop shaft. prob a new clutch, resurface the flywheel. have a neetronics dccd controller, recommend a dccd pro. I've since upgraded to matching gc8 3 pot/2 pots, they are cool. parts are easy, i just get 2005 sti whatever.