Originally Posted by V8&4spd
If it's a 70s engine than it's a 2 piece rear main seal. The 1 piece seal engines started in the late 80s. Both the big and small flywheels can be found easy for the 2 piece seal engines. It's a little bit harder and cost more to find the aluminum bellhousings for the big flywheel.
can I verify it being a 2 piece by visual under car?