Starting problems, keeps cranking but no start up Options

[Tumult5sfe]

I had to do a head gasket some time back. put everything back together and went to start it but the battery was dead...so i slapped the charger on the thing and poof, my one ground wire that leads from driver side inner fender to engine went up in smoke. now the damn thing just sits and cranks all day long, i get plenty of fuel, not a strong spark but there is spark, and pretty much thats it.
so does anyone know what i may have to do? i grabbed another ecu thinking i cooked it, replaced the ground wire, and a few other odds and ends. also, when i turn the key off my fans kick on and the temp gauge pins hot, and they shut off when i flick the headlights on and off. Any help would be amazing.

[Spider77]

Well, so you got fuel, and some spark? How bout air, does it sound like the starter is putting out enough (slow crank, fast crank), battery voltage/amperage? I dont really know what to tell you, there are ppl on here who are better versed with wiring issues than I am. But it does seem like alot of stuff leads to the ecu. The one you put in, was it good, new, used (as in off a salvaged vehicle)