which flywheel is correct?

The casting number on the bell housing will determine the size of the clutch assembly.You can have a 10.5 unit or a 11.0 unit.The flywheel will have its own bolt pattern,on yours it will most likely be a 10.5 unit.Post the casting number of the bell housing and we can go from there,if its a 11.0 unit,you can use the 10.5 unit still or upgrade to the 11.0 unit depending on power level,mrmopartech