You'll most likely need to plan on also changing the upper A arms to old ST arms (or the RTR neo) : these hubs were design for MP7.5 type front end whereas the ST-RR evo is like a MP777.
FYI : 'm running MP7.5 hubs on a MP777 converted to GT and had to use MP7.5 upper front A Arms because the reduced caster make the top of the hub too far forward for the MP777 stock arms. So I guess it's the same effect on the truggy.