Truck won't start! Ignition help needed

[ginter]

I got no spark! 72 Cheyenne 350/350

The truck was running like crap, cutting out pretty bad. It started out slowly, but over the course of a week it got progressively worse. Acted like a fuel or vacuum issue. I went out Sunday and started the truck, still ran like crap but it did run. Checked vacuum and replaced very short carb bolts (recent engine swap) and couldn't find any leaks. Went out and bought tune up parts, and changed the plugs. THAT'S ALL! Plugs that came out were mint, normal to a tad lean. Obviously they were all firing OK. At this point the truck wouldn't start at all. No spark. Not even trying to fire. I have 12 volts at the coil during cranking, the hot wire to the coil itself has power. A new coil tests exactly the same as the old one on the bench with a meter. Primary 1.5 ohms and secondary 11k ohms. Installed the new coil with the same result. Pull the swcondary coil wire off the dizzy and check it for spark against ground while cranking, nothin'. I pulled the tach wire (I think that's what is) from the negative postof the coil, and pulled the external condensor (radio suppression) from the positive pole. Nothin on the coil now but secondary wire to the dizzy, positive wire for power, and negative wire to the dizzy. Still won't start.

Any ideas?