Help!!!!

Ok,,,I went thru each wire and found 2 that were crossed. Fixed those and even made sure the nut on the condensor wire was tight. Changed the oil and temp sender. Tighted all connections at the starter,battery and altenator. Crossed my fingers got in and turned the key. It fired right up and had a very poor idle that was very rough and lopey. Then noticed it has started to blow dark smoke. Now I am stuck!! I didnt change the starter so that goes back. Oil pressure switch is going back too because the one they gave me at the parts store looks like a bell, the one on the car doesn't look like it at all.

So with the return money I am going to buy points,feelergauge and a timing light. Any thing else I should add?