People have done the conversion successfully using mostly all OE Subaru Legacy or WRX parts
IE: trans, differential, pedals etc
Short shifters, Clutchmasters & Centerforce clutch kits offered for those who plan on doing one or already have done the conversion
Although its a cool mod, Im not 100% sold on doing it
No real long term info is known about how the transmissions and clutches hold up.
Also making a really good Trans crossmember or Mount is essential.
Much more info can be found on
subaru-svx.net in the Forum pages