PCV issues?/hesitation

The 1963 440 also has the slant 6. When I take the carb off the Dart and put it on the 440, the 440 runs perfectly. If not the PCV system, I can't see why it wouldn't work equally well on both engines. Did you note on my first thread that the intake manifold does not have a hole that matches the PCV hole in the underside of the carb? That is why there is no vacuum at the PCV valve or carb hose port. If the 1965 Dart did not come OEM with a PCV system then this is likely the correct intake manifold, however, if it did come OEM with a PCV system, then this must be the wrong intake manifold. I have not been able to determine if the 1965 Dart came OEM withg a PCV system. I feel certain that if I drill a matching home in the manifold that I will have vacuum at the PCV, but I'm hesitating to do that unless I have some confidence that it will address the hesitation issue.
I know from the limited records that I have that the Dart had a Carter 2 barrel carb before the Rochester was installed. But once agian, if the Rochester works well on the 440 why doesn't it work equally well on the Dart? Seems to me that the major difference between the two is the PCV system.
I appreciate all your comments- please keep them coming.