I agree, the first time i pulled the eec it was a bit challenging for me. Took probably 30 minutes. But last week, I replaced my eec with a tuned one, and it took less than ten minutes.
As for changing the oil, the 4.6 motor's filter was hard the first time I did it, but now I can do it in 20 minutes flat without spilling oil anywhere but in the catch pan.
Justin