Also looking at the engine pic it looks like you've got manual brakes, so switching to power brakes would help a lot. If you've got drum all around as well, that would explain having to really push hard on it. As for the brake pedal going to the floor, that sounds like air in the brake lines, contaminated fluid, or, the proportioning valve could be way off. Check your master resevoir level to see if its low and look for bubbles as well. If everything is fine, bleed the rear brakes again, and see if fluid comes out fine, or if nothing comes out..a kink in a line. If everything checks out, Id lean towards proportioning valve problem.
Finally, are those ladder bars in the back that the red arrow is pointing too? Frame connectors connect front to back..right? The arrow looks like its point to the bars in the back, typical of a drag car.
btw: If you have doubts or major Qs, don't be afraid to ask a mechanic to do a safety inspection of everything before really opening it up. Brakes are not something to mess with if you're unsure. As for the electrical, start with grounds, fuses, tight connectons, and then onto bulbs, frayed wires (and then onto the multimeter for resistance, etc.)
It looks like a nice car...please post more pics and feel free to ask more Qs..
