You'll also need the rear diff carrier, as the SVX has it's own unique one, but they shouldn't be to hard to come by, even a really badly wrecked one that is one part that hardly ever getts damaged.
All the holes are allready there, as all the SVXs was originally AWD, so every thing should just bolt in(at least with an AWD auto tranny
)
If you go with the 5-speed, a early Legacy driveshaft should be easier to find, and will work since you have to get the front half legthened anyway.
Good Luck
__________________
Huck
Subaru Ambassador
92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD
88 XT6 AWD 5-Speed "Bride of FrankenWedge"
15 Impreza Premium Sedan
15 Crosstrek XV 5-Speed
My 5-Speed "How-To" Write-up
1976 Pontiac Firebird Formula
Current Count of Subaru's Owned.... "70"