I now have a 351m completely dismantled in my shop. Was told that they do not make a good engine for off-roading. It was given to me and had a spun rod bearing,it is rebuildable. What mods. do i need to do to make it the next engine for my 82 bronco (302). (pistons,cam,etc.)Iknow that i'll have to change bell housing (4-speed man.)motor mounts,etc. Will my 3:50 gears be o.k. or change.