Hey, I'm thinking about putting an inlne six in my f250 4x4. I know this sounds strange, but I blew up my 400, and I have an excellent running six sitting around. Not lookng for perfrmance or anything, I just need to have my truck on the road. I'm not real concerned about the 4x4 part of it rght now, I just need to know what it'll take to bolt the six inplace of the 400. Do I need different frame mounts and everything? Any help would be great. Thanks.