TNS_Datsun

Ok, Im about to pull my hair out! haha I was driving my 620 a few days ago, I had just recently bought it and had drivien well over 60 miles or more. I left work one afternoon after putting new plugs and wires on. I was driving and all of the sudden I loose power and hear a sizzle noise. I pull over and and pop the hood, I see instantly my coil wire fell off. It was pluged into the distributor but not to the coil. I figure "easy, plug it in and ill be on my way. NOPE! it wont start, it turns but nothing. I was getting a semi weak spark from the coil, I replaced the coil, cap and rotor. I test all connections and getting 12 volts. I am getting 10 volts on crank at the coil + wire. I was getting no spark past the distributor, I replaced the ICM and now I get no spark what so ever. I wired the coil and distributor with wire to bypass the harness, nothing. Im so confused, I have power everywhere I need power but no spark! Does anyone have any good ideas for me to check? I am new to datsuns but I am a tech, Im still fairly green tho. Thanks!