Bellhousing match up

No and No.
Also for 1983...
You would be talking about the Original Buick 3.8L Engine (Essentially a Buick Small Block V8 with 2 Cylinders removed) NOT the GM/ Buick Corporate 3800 Engine.
Different Engines and different Bell-Housing Patterns.
Ever wonder where Chevrolet got the idea for the 4.3L V6?








