It would also be advisable to slightly slope the rebar in different directions. Imbedded at different directions creates a sort of Chinese handcuff. If you would like to try, get a couple of pieces of dowel and insert into holes drilled in two boards. If the holes are drilled with a drill press, then the two boards can be readily pulled apart, but if the holes are drilled on an angle to each other, you might as well glue them together. They will not move without removing the dowels. A lot of effort goes into getting good anchoring systems like Hilti Anchorss to bond the rebar into holes in the concrete, when having them at an angle will prevent them from coming out better than the anchor system, by itself.
Zone 7 A/B
Keep your words sweet. You never know when you may have to eat them.
Richard