When you say healthy, have you done all the the tests required to get a CHIC certification on your boy? Has both of his parents been tested with results available on the OFA website? Have you shown your boy in conformation or done any lure coursing with him?
There are many things that should be considered before breeding a litter. What qualities do the parents offer the breed? Have they been tested for at minimum the 4 health tests required to get a CHIC certification, Fanconi, Thyroid, Hips and Eyes? Are you willing to be responsible for every puppy for the entirety of its life no questions asked if the home doesn't work out? What is your goal for the litter? What do you hope to accomplish? Are you prepared in case there is complications during pregnancy or birth? An emergency vet visit can easily run over $1000 and there is the risk of losing puppies and/or dam. Have you gotten involved in the basenji community? Are you aware of basenji rescue and why basenjis end up in rescue so your puppies are not at risk of needing rescue?
These are just some of the questions that should be considered before breeding.