Eric,

This is a frequent topic in this forum. Look at this post from "Mugsy" in this thread and you'll get an opinion about leaving the rear end as is (4.57) and changing the tranny to a T5 which has an OD.

https://www.stovebolt.com/ubbthreads/ubbthreads.php/ubb/showflat/Number/59155/fpart/2


"Nothing astonishes men so much as common sense and plain dealing." - Ralph Waldo Emerson