What adapters do i need to fit 6 lug wheels on my 5 lug
 

97 f-150 4.6 130,357 miles 4wd

not a good idea. stick with 5 lug wheels.

Umm, 5 lug to 6 lug adapters?
Seriously, google "5 lug to 6 lug adapter f150" and you will find what you need.

You will aslo see it is not recomended. It pushes the tire out further and puts more stress on the axle bearings. You also have issues with them coming off (rare, but does happen), breaking or warping and then the cost of them (a quality set is $300 or more).