I hope someone can point me in the right direction?

Well NO LUCK. I got down here to work on my car late Friday night and my father in law had already taken the new rebuilt Master cylinder back and got another one. He tried traditional bleeding and still no pedal. So I told him about bench bleeding the way explained here (disconnect from mc and run short lines back into the bowls and then bleed like normal). He seemed to doubt this would do anything compared to cracking the lines like he had done but I did it and still no pedal. I took off the old drum brake distribution block and replaced it with a 73 disk brake proportioning block from my parts car (the only thing I had not done on the upgrade). Still no pedal. So after lots of frustration we finished making the exhaust and then the Fed Ex guy dropped off my hood scoop! So this kept me from cutting my wrists. I re-read the directions from the earlier posts about the brake light being on in the dash from the switch in the distribution block. I changed this part and guess I assumed wrong that this would fix it. So I plan to hook up the battery and check for the brake light and then see if it is on.
Could someone please explain to me how to reset the switch if its tripped ? I only have one more day TODAY to get this fixed so any help or suggestions are greatly appreciated.
ThanX