I'm not speaking from hands on experience here, but from what I hear:
- GE and GZE pumps for the same year engine will be the same.
- FWD and RWD pump bodies have different lengths
- FWD and RWD pulleys have different offsets
However the total length of RWD pump + RWD pulley = FWD pump with FWD pulley.
Other more expereinced hands can probably confirm or deny this.
Hen