We bought a nice rust free 1989 Mustang body, 302 , no engine or engine bracketry (wiring intact).... Bought a complete low mileage 1998 Explorer 302 engine/ 4r70w trans. all intact. Will it drop in as is or does it need the Mustang engine bracketry?...Trying to keep the costs inline?.. I see fancy pulley/bracket kits online, want to stay near to stock as possible. To me it looks like it would mount in???..Already have the valve spring change over, etc.