New to A-Bodies

Just talked to the seller this morning and I will probably picking up the car tonight as long as the tires get in early enough. Super super super excited. Had a question for the people out there though.

The engine bay is by far the worst looking area of the car, which is nice to say. Ha. The bay looks like its never been cleaned and is looking pretty nasty. Going to be doing a tune up and valve adjustment tomorrow or Thurs. but wanted to clean out the bay as much as possible while I am in there. Any advise about the best way to go about that? I've cleaned engine bays before, but it has been in prep for paint and without an engine, so a lot easier to do.