Ha ha how old are you and how strong , the mongrel IS heavy but I had a mate help me for that bit , I was on my back and had the box on my chest then sort of wrestled it into position . Once we got it lined up with spline it just slid into position and we just put a jack under it to hold it while the rest of the bolts were fitted . The pig part is you need to get the van up high enough to lower it and clear the bottom of the van subframe , you also need to unbolt the steering rack from memory to get the box out . Someone may have more info as my memory of the swearing etc has faded .