Can I increased positive castor ?

2007 Tacoma base 2WD w/2.7 engine

Anybody familiar enough with the front suspension on these trucks to say whether positive castor can be increased by front suspension adjustment?

PHM
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Someone else can chime in but I've changed out upper and lowers on mine to lower it and Im pretty sure the only adjustment is camber and toe

 

On the 1st gen 2WD 5-lug, caster is adjusted the same way as camber, by adding or removing shims from the bolts holding in the upper control arm shaft. Adding shims to the rear bolt/taking shims off the front bolt will add caster.

It looks like on the 2nd gen 2WD 5-lug you guys have eccentric cam bolts on the lower control arm pivots. Moving the front cam in/the rear cam out will add caster.

I wouldn't try it without an alignment rack, it will throw off your camber.