Does anyone know if it is possible to swap a 5 speed into a 78 k10? I had a t-350 then switched to a 700r4 but i don't like it. It seems weak. I would like to get a 5 speed so i can put lower gears in it without having my rpms go through the roof on the highway. All i can find right now is the sm465 4 speed. I wouldn't mind that if i could get one without the granny low. Any advice is apprieciated.