1990 k1500 ignition problem

my truck is a 5.7 with an ignition problem i broke my slip yoke and ujoints so it sat for a week or so then repaired drive shaft but now it wont start it rolls over and wants to start but wont then every once and awhile it shoots a fire ball out the tbi but wont start any thought would be great. thanks in advance

my truck is a 5.7 with an ignition problem i broke my slip yoke and ujoints so it sat for a week or so then repaired drive shaft but now it wont start it rolls over and wants to start but wont then every once and awhile it shoots a fire ball out the tbi but wont start any thought would be great. thanks in advance
Could be a dozen different things.
Do you have spark at the coil wire? If so, do you have spark at the plug end of the plug wires? If so, ARE THE PLUGS FOULED?

Do you have proper fuel pressure? Do the injectors squirt fuel as the engine cranks?

What is the cranking compression of each cylinder?