Slant six 904 VB in 727

Like KickDown said; the park rods are different. Most of the time I see the ptk vbs on the newer cases and like I said there is a difference in the case configuration right in front of the rear servo. I have a lot of transmissions come in with the old vb on the newer case and I rebuild them and I never hear any complaints, but I would think it wouldn't be right since they vent accumulators differently.