Can someone please tell me what else I may need to cover besides the dist. cap, the carburetor, watching out for electrical wiring and battery when trying to clean engine compartment on my 1976 Bronco?
I think all of the suggestions are good, and worth considering. I believe a lot of what you pay attention to depends on how you intend to clean the engine.
I tend to keep my engine pretty clean to begin with, so for me, cleaning the engine usually only involves spraying down everything with Simple Green, then hosing off with a low pressure spray. If I'm doing that I don't even bother covering the distributor. I do run the engine just a bit before cleaning, and sometimes will pop the distributor cap off when I'm done, to allow any moisture that did get in to evaporate.
But, if you need to remove 30+ years of dirt, grime, grease, and who-knows-what, and the plan is using a pressure washer, then I'd maybe consider doing a bit more of what was suggested. But mostly paying attention to what I was spraying!!!
And, welcome to CB.com!!!