Is the rear end drive shaft yoke on a CRV rear axle the same for a 454/ls5 and a 396?

My GM parts book does show two rear flanges, one for 70-72 Chevelle w/1330 H.D. u-joint (#3879208) and one for 70 All w/12-bolt (#3896118). Of all the POPs I have verifying engine/trans, both the LS6 and LS5 seem to have a CRV 3.31 posi coded rear though, most 402/350 appear to have CF or CR (posi 3.31) or CW (open 3.3.1). Then again, all the POPs I have for 70 LS5/LS6 only have posi rears.