A zilla motor will not be a cheap swap but all the guys I have talked to love the end product ... There is guys in here that can help source either a 250 or 500 motor and all the right parts so it functions properly ... I if you do a 250 try to get the 87 cylinder they are supposed to make the best power from what Iv been told ... You could also snag a anti-vibe steering stem and fasst bars to help eliminate the bad vibes your getting ... Post some pics of this rig Iv never heard of this hybrid before