you need to start looking at some other peoples similar builds. you should start with a solid chasis though, just try to find a good roller. most of the evo conversions i have seen in the states use a lot ovf evo 6-9 parts for the drivetrain, suspension and motor. you will be either flying parts in from japan or doing a lot of custom modification to the chasis and suspension to get it to fit and work properly. Its a big task, but when done right it will be a beast. search for evo6 conversions and see what path they followe, either custom made or JDM imported. You dont need all JDM parts use some of the newer evos here in the states to run that AWD system, but this may require some custom fabbing on your end. Just remember its a conversion and there is no standard assembly. you will find hold ups and hang ups, but when its all done it will be worth it.