Will not start

Check the coil for spark and the wires attached to the connector and the fuses also the cap and rotor and spark plug gap a worn cap and rotor or pick up coil will do it check for spark first the look at plugs cap rotor coil etc. Theses came with 4.9/5.0/5.8 motors all are similar duration spark ll ignition systems so check the easy stuff first al are fuel injected try spraying fuel are cleaner into the throttle body if it runs and dies it's a fuel issue here and check the idle air control valve they usually do the same when they go it just stops working

coil bad? check the ohm rating to see

1/ Have you fitted the spark plug leads in the proper firing order.
2/ Look inside the top of distributor Top (this is not the first time a new distributer cap has very small crack) or the rotor arm is fitting the cap properly. Hope this helps Best Wishes, Malcolm Campbell.

Replace the spark plugs and wires along with a distributor cap and rotor. Be careful to leave the old wires and plug wires connected to dist.cap, just remove dist. cap from the distributor and lay aside with plug wires on it then install rotor then new cap and proceed to replace each wire for cap and spark plug one at a time so you don't mix up the spark plug wire firing order. Cap laying to the side is used for reference purpose.

definitely a fuel issue. be sure to check that the distributor isnt 180 degrees off. you say it'll start when you pour some fuel into the carb, it sounds like you arent getting enough fuel then. try adjusting the float level higher so that more fuel will be pumped through. and how old is the carb? has it been rebuilt recently? make sure the jets are clean and adjusted properly. make sure none of the mixture screws are bottomed out. it sounds like it's all the quadrajet's fault on this one!

Go back and check the wires are in the correct order. You need fuel, spark and the spark at the correct time. You have two of three.

sounds like firing order wrong

No spark is uasually caused by a faulty coil or the trigger unit,both are inside the distributor. Get a used distributor fron a scrap yard (about $4o) and replace yours.Remove the dis.cap and turn the engine until the rotor is pointing to fire # 1 cyclinder,and mark the exact position of the base before removing from the block." Do not turn the engine" Install the other Dist. with the base in exactly the same position and the rotor pointing exactly to # 1 cyclinder. Note. Failing to install the other dist.exactly the way you took the first one out will throw the timing out!!!!!
Be doing all of this be sure there is no spark.
Naz

Have you turned over engine with dist cap off to check that rotor is turning?You may have sheared a distributor drive gear.

make sure that the right cap goes to the right plug. they are specific to firing order.