Ok, that is the +1" size from stock, so it isn't too surprising you are getting a bit of rub without a correct alignment.

Changing caster requires an alignment, generally at a decent alignment shop (many cheap places don't like to mess with it if they don't have to).

Some reading:
Caster, Camber & Toe Explained
https://www.tirerack.com/tires/tiret...e.jsp?techid=4

The truck can drive decently and have normal tire wear with caster on the low end of the OEM spec, but for maximum tire clearance you need maximum caster due to the way it is adjusted on the 4Runner/Tacoma (and many other double wishbone vehicles).

Increasing caster moves the wheel forward in the wheel well (top arm stays fixed, bottom arm moves forward). When this change is made, camber and toe are also affected, so it takes a decent alignment tech to get it all correct.

-Charlie