no spark to distributor cap

Hey guys. I have been working on a 66 barracuda for 3 1/2 years and am finally ready to start a built 68 340 I put in it. I have fuel to carburetor and power to coil but nothing coming out of coil to cap wire. Odd thing is with key "on" I have power to both + and - side of coil. I thought I just had a bad new coil and bought a 2nd but have same problem. Have installed electronic distributor and wired it to directions but here I am. Any help is greatly appreciated. I am freaking out being this close and it not starting.