65 Fastback with a 93 5.0 and a T-5, looks like the rear main seal is leaking, we replaced it when reassembling the motor and trans but it seems to be leaking. Can it be removed and replaced with the motor in the car and pulling the trans etc from below ? Not quite sure how we could have screwed it up but it seems we did, not looking forward to having to do this......Anything I maybe missing to verify the leak ? It dos not look like it's from the oil pan as the drip is running down the engine side of the block spacer. Any suggestions ?