As far as putting a 5 speed in an fj40, what are your options..nv4500 and h55. how much does it cost to do this to a 2F or would it be cheaper to get an overdrive unit? also was there ever a 40 made with the older styler front doors and the rear lift door with a 2F engine or did toyota switch the doors with the engine. i had heard the late 74 models had the early doors and 2F. thanks