I recently changed carbs to a new edelbrock 650 so i know im getting fuel. i have been driving the car for over a month, i started the car the other day it seemed fine then it died before i could leave. It will turn over all day but will not start. i have replaced the distributor with what came out of it an msd hei distributor. when i tried repeated starting i fouled the plugs so those are replaced now. i get a spark from a wire to the block, im getting 12 volts to the coil.i also replaced the ignition switch , the neutral safety switch and the battery within the last 6 months. the only thing i havent replaced is the spark plug wires. im getting a spark so i figured that wouldnt stop it from cranking. im totally lost here , help me out.