Connected Battery backwards...ouch!

I have a 1973 Dodge Dart Sport. Connected battery backwards, hit the ignition and saw white smoke. I found the wire that burned out, but the fuel pump stopped running, so I bypassed it directly to what looks like a solenoid connected to the engine block at the back of the engine? I'm trying to trace the route of the electric fuel pump wires. What is this, metal thing screwed into the back of the engine block? The care cranks over and fires about 2 cylinders and then just cranks? Any suggestions on what else I could have burned out? Relays, ballast, solenoid, MSD timing? Any help would be great, I feel like a total #$% A$#!