I have a 96 chevy Z71 with a 350 vortec and a 4l60. 4l60 is in questionable condition, and i want a 5 speed bad. Do i have to use 96-98 nv3500s? or can i use the older ones too? I know i can just run the neutral safety switch as the clutch switch, and i just have to move the wire for the reverse...