Installed new Crankshaft and Key...

Ok well 2 days ago I picked up my 97OBW from my mechanic, as mentioned before my crankshaft pulley was shaking and my belt fell off. Upon initial inspection my mechanic told me I need a key and pulley, then he calls me and tells me that the crank was bent. This might as well be a foreign language to me because even though I can do my own oil changes, tune ups replacement of alternator I am really not anywhere close mechanically as you guys here on the forum.

Long story short mechanic told me to get a used engine, I have had terrible experiences with used engines in the past and would rather not bother. I know my current engine is strong and mechanically perferct except for this problem. So then he tells me if I dont get used engine 90% chance the crankshaft pulley will get ruined again.

SO I just decided to roll the dice and have him install the key and pulley and told him to TORQUE it properly. So when I picked up the car he told me he torqued it till he couldnt move it no more around 120lbs.

So now I have a car for sale:) hahahaa just kidding, I love all my soobies rather drive them to the grave than sell. But I am worried about this damn crank issue, it seems totally fine now, are there any post precautions that I can take here? I.E. every week re-torque or tighten the damn thing? I live in NYC and to find a well versed Subaru mechanic is not that easy and for the 2 dealers that I know of are always booked solid for weeks. Has anyone gone thorugh this headache here and can throw me some advice would be really appreciated as all your comments in the past have been. thanks