Yeah they shall work both front and rear I have 17x8 with 4.5 bs on a 245 45 17 in rear..also works in front 4.75 youll have more to work with..more so if you lower car from stock the height
They will work with wheel spacers with no problem. There's no way a 4-3/4" backspace is gonna work on a stock Maverick without spacers.
I would run a minimum of a 1/2" spacer, and preferably a 3/4". It really depends on the width of the tire you want to run though.
Did you ever get these? Like i said in first post, most likely wont need any spacers.. Those rims are built old school..just backspace.. not like the newer cars or mustang bullet rims that have a crapload of negative offset built in