I would do it. But I would only do it if I were you. If I were still me? No way.
Black Walnut trees are one of my biggest adversaries as a gardener. The frustration trifecta of Deer, shade and black walnut trees is no joke. Black walnut trees release high concentrations of a chemical called juglone which many other plants find toxic. This is part of the survival strategy of this species, an attempt to create more plentiful and favorable conditions for itself and other black walnuts by poisoning the competition. However even if you cut down all your walnut trees and dig every last root out of the ground it will be ten years before the juglone that tree produced disipates. Never never ever ever put black walnut in your compost pile, doing so will taint the entire pile and almost everything you use it on will suffer, and likely die.
For those reasons and the ones others have mentioned I won't touch the species. Compound leaves are a challenge and super long internodes make great saw logs but not so great bonsai.