Good to hear another car will be back on the road soon! Paste this into your browser for some advice about pos to neg earth conversion. http://www.spritespot.com/Download/Positive%20to%20Negative%20Groun...
As for pictures you should find lots of good stuff on the net. I can also highly recommend Terry Horlers book, Original Sprite & Midget, which is a great source of detail relating to the cars.