I would avoid using a T fitting on the port used for a power brake vac canister. The reason I suggest this be avoided is the
oil film or even a little
oil in a low spot of the feed hose that can be found after a few hundred miles after install. Probably others on CC that can speak to this better but that is my reasoning after inspection over the years not to mention if a PCV fails open it could also lower available brake source vac.
Put connection as close to carb base on manifold as possible and avoid connection on a single cylinder runner (often a plug in many manifolds 2 to 3 inches from #8 cyl to head gasket). All things are possible but a proper install will not affect carb jetting or lean 1 cyl. out or change RPM when you block PCV with your thumb at idle. If it does something is wrong with the install or system.