I'm Stumped!!

[THIRSTY]

i was driving my 72 around looking at houses. It was aroung 105 out and now i know not to drive when its that hot. I have a 454 bbc in it. Got home fine. But when i went to start it again to put it back it the garage it wouldn't start. just cranking like a mother. Figured vapor lock right? Wrong! it cooled down and still no start. Took two plugs out which look okay to me and touched them to bolts and no spark. I have hei so i figured the modual is fried. changed it and the rotor. Still no spark. Its just cranking?!!!!! I'm rather frustrated. please shed some light. I have new summit racing 90 degree wires. Surely all the plugs didn't go bad. I just don't know.