Hope Mark has’nt installed that basement heat loop yet.
The best thing you can do before you do so is to get a brass vent 90 fitting on one end of preferably the return side as it goes back to the pump with a coin vent screwed into that. Then, bleeding air from the loops is quicker and less of a hassle. Also, assuming you are piping in a new zone branch, while you’re at it get a Auto-Vent on the bypass (assuming you have some sort of bypass piped into the manifold) or at least get one on a riser coming off the return line. You can also sweat in some new ball valves between the return, or supply lines, in order to help force the air out as you purge the system by being able to isolate them.
Just a few suggestions before you begin your project to help upgrade your air purging capabilities.