I understand the only change for the T0164 upright is that the steering arm is 4mm lower allowing you to use shims to change the bump steer. However this will be limited unless you also update the lower arms as the new arms are cut away to prevent fouling. You can probably still run the new uprights but have to shim them to 4mm and thus not get any change.
Currently we are using 2mm where the kit MTX4 is 1mm

We've found this to be quite a useful tuning tool although it still kinda go's against the grain - I used to muck around with Hot Rod's ans bump steer was a real no no and is caused by bad steering geometery.