Impreza RS 5 spd tranny strong enough for a SVX?

hi

conversion cost is $2500 cdn (parts and labour) + cost of clutch for a RS tranny and rear end.

If I want a WRX one, its $500 more

Is the RS tranny strong enough for the torquey SVX motor?

car has 215k miles on it... an auto tranny and rear end from a 97 legacy will set me back $2k cdn installed. Is it worth spending that much on a 5 spd on such a high milage car?

engine runs beautifully.. and it has passed emissions with flying colours...inside is nice, but outside rear quarter panels have rust bubbles and need attention.

what would you do?