what is required 2 get a 12a rotary in a 1200 ute engineered and which brake set up would be required for a rotary set up i will be getting the maddat rotary conversion set up any help would be great

What is required is that you enlist the services of an engineeer...the engineer ultimately decides does he not?

correct, find an engineer and ask him for solid answers.
best we can do is give personal experiences which might not be the same as what your engineer thinks

for instance you only realy need to upgrade your brakes to deal with the extra weight not the power. so standard stanza brakes or the s13 silvia brake setup would be fine. but then other engineers require you to fit a booster...dont know why, but they do
and some will want even bigger brakes

we can tell you how to put one in thats no drama whether an engineer will approve it or not is a different story