Maybe its just me.
Are you sure coolant is coming out the exhaust?
Youll have condensation in exhaust and it will blow out. And youll notice it since your exhaust up against the wall.
One thing Ive learned from troubleshooting. Check the obvious first.
Since motor was disassembled, go back and make sure plug wires are seated both ends and in right location, make sure inj plugs are in correct order, you get the idea.
Double and triple check.
Eliminate the obvious first.
If you have a plug soaked in gas, its probably not firing. Plug wires, coils and coil wiring check. Make sure your coil wiring harness isnt fubar. They are usually brittle and bare wires showing. And if you dont have factory plug wires, make sure they "snap" on a plug. Use a spare plug to tell.
Just my two cents