i just inherited a 1987 F150 4.9L i cant find specs anywhere on the net like spark plugs/gap oil tranny oil diff oil wheel size tire size. i guess ya'll get the pic i am at a loss have never owned a ford in my life but i am willing to jump right in there and go for it.Just want to be buying the right tune up parts and stuff i need to keep'er on the road.any help is appreciated.
Rob

 

All that stuff is listed in the Owner's Manual, get one from eBay if you don't have it.

Aftermarket third-party repair guides generally have that information, too.