I have seen several threads on over drives but no one ever says what they are spending on their stuff. So what am I looking at costs on these options? What is a Gear Vender run? If starting from scratch and need trans and convertor what about the 4l80 including electronics to operate it? I am thinking the 700R4 maybe the best option as far as cost and what I am looking for. I want to be able to drive the thing anywhere including long raod trips. Its going into a 68 Chevelle with a mild 496 and a 12 bolt, full interior. I am not going to be racing this car but driving the wheels off it.