hi lonnie, well in my 66 c10 i've got a 1982 gmc 305 v8, the orignal 3 speed trans,and 6lug rearend. on the open highway my rpms are to high at 65 70 mph. i want to use the burban rearend because of the 5lug ???? what would be agood gear and can i find it in a boneyard???
