Moving rear end back

are you doing it for the look and stance....or because you are wheeling too much off the line? I am just guessing but if its just a 1/4 inch or less...why not use the spacers in the front....that would be super easy...you wouldn't even need to lengthen your shaft or anything else....would ya put the spacers in and go.........That drive shaft is in there along ways if its A727 or A833...not sure on a904....JMO