Can't blame you for hesitation. You've done a lot of work so far and the task is daunting but, worth it. I think it is safe to say that 'what happened to the days' is you bought a diesel that is 'way more simpler than a gasser' in some ways but, as with all things, there is a trade off. Even replacing the valve cover gaskets on my 95 Tahoe w/ 350 gasser wasn't just 6 bolts though.
Injectors can stay put but, the lines are coming off in order to get the valve covers off unless you want to just try bending them which means you're replacing them which means your pulling all this stuff anyway so...enough of the sarcasm, sorry.
Turbo (four 13mm nuts plus two 10mm bolts at the oil return [new gasket there as well] two 10mm for the upper brace and the other brace is either 13 or 15mm at the turbo plus the hose clamps);
Upper intake is six 13mm bolts and small screw driver to disconnect sensors;
Lower intake is 16 15mm bolts lower intake plus the nuts on the studs holding down the other end of the turbo brace, grounds, heater hose and (in any) solenoid braces;
19mm IIRC for the injector lines (mark and memorize the order they came off) and 6 or 8mm for the little screws holding the injector line retainers to their brackets.
There's probably something I'm forgetting but, that's the gist of it. Then you can get after the valve covers. I replaced the bolts with studs to help keep the covers aligned.
You'll be glad you did the job when finished even though it is a bunch of work. My back hurts just thinking about it.