My chevy died, and i don't know what on earth is wrong?

I spent the weekend working on my truck, new temp and ammeter, installed my cd player, buckets seats on custom built mount, changed the oil and replaced a u-joint. after i was all done, my dad and i ran into town, on the way in, we noticed the temp gauge was not coming up, i had tested it in the garage and it worked fine. we thought this was rather odd, the heater has always worked really well in this truck. my dad suggested i slowed down and ran in 2nd gear for awhile and work the engine ( 4-speed). i down shifted to 3rd and slowed down and then went for 2nd, i was apparently going a lil faster then i thought and barked the tires and over revved the engine, i quickly clutched and popped it back into 3rd, with in the few seconds, the truck died. i tried to restart it both with the starter and by bump starting it. we ended up dragging the truck home and did the following:

replaced ignition module with known good-no start



checked coil ( 2 plug, 4 wire) and found continuity between all 4 pins (is this right?)



checked ammeter wiring ( i tapped into the lead off the battery up to the distribution block on the fire wall) found the connector i had installed at the distribution block was loose, but i still had full cab power.



i retrieved trouble codes manually ( i messed up the first time and jumped the top 2 pins on the left, i corrected myself and only got code 12 i left it run for some time to make sure. this bothers me as i have owned this truck for a year now and it has always had a check engine light on. it would go off and come on all the time, i ignored it because the truck ran fine.



it has no spark, the fuel pump runs, we did not crack a line to check for pressure, but i replaced the pump last spring. however we never see fuel spray while cranking, should we?



we also noticed the AIC was noisy and seems to run constantly until you try to start. this seems odds. i don;t know a lot about the tbi system i am learning as i go. i prefer points or HEI, i need help on this, this is my %26quot;good%26quot; truck, for now i have to drive smokey, the oil belching and spewing 74' with the leaking rear pinon, please help.
My chevy died, and i don't know what on earth is wrong?
Did you check the fuse for the ignition? Continuity test between the 4 pins on the distributor isn't going to tell you if the ignition module has failed, so I'd replace it if everything else checks out OK. There's a slight chance overrevving could have caused a mechanical problem: a broken timing chain would mean the distributor doesn't turn.

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