Its going to be hard to get a running engine and transmission for $450. What kind of transmission? T125 automatic, 4 speed manual (Izusu) or 5 speed manual (getrag). A good getrag transmission is $750-1000.
Depending on your location.
East: Kick Hill Farms, Lebonon CT
www.kickhill.com
South: The Fiero Factory Toney AL
www.thefierofactory.com
Midwest: Twin Lakes Fiero Paxton IL
www.twinlakesfiero.com