When you say at the end of your first post "Still just the clang and no crank":
Do you mean you hear a solenoid working making the "clang" noise without any actual "turning over"? Or is the starter just struggling like hell and just stopping abruptly?
My roommate's Lincoln Town Car (not sure of the year, mid 90's though) had a problem where he'd turn the key and all he could get was the solenoid to click on. Nothing would make the car turn over (at least from the key). Turns out it was an electrical connection that detached! He plugged it back in and it started right up.
Although your car undoubtedly benefited from all the love you just showed it by replacing sensors and whatnot, I'd follow up by re-checking everything you disconnected. Good luck.
