the back halves are the same, the front halves are different between turbo and N/A. (i believe the r-154 ((turbo)) driveshaft has a shorter front section because the tailstock of the tranny is longer)
which would make the w58 (n/a) tranny's tailstock shorter than the turbo's, which would mean that the front half of the driveshaft is longer. did that make sense? haha
-shaeff