Honestly I'd be a waste of time running 5lbs... Vs the potential of rod failure... I'd just get a header exhaust throttle body and a mild cam set up... With the same results
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you could go this route, or go simpler... Get a AEM CAI, DC Sports Header and you will get a noticeable enough boost to low and midrange acceleration without risking blowing the motor for a little more add some stage 2 cams.
B18A1 stock will take ok to low boost, but only with a rebuild and a tune. for higher boost applications you would have to get aftermarket bottom end parts (Rods, bearings, etc)
You definitely don't want to just slap a turbo on a higher mileage engine, like others have pointed out you will risk damaging those old &worn parts... and need a new engine before too long.