Start problem HELP!!

[JYDSK2 at aol.com]

Just broke the distributor gear, replaced it with brass one, cranked the car, 
started idled and revved up fine, walked around to open hood to check 
everything was bolted down....engine died. Has shown no signs of life since. Checked 
coil. All fuses checked. I do believe to hear fuel pump hum after cranking. I 
do not get spark from coil. What the #$% did I do or what the #$% did it do in 
the 30 seconds of idling?
Any and all suggestions are greatly and immensely appreciated.