1964, you're right about the OD transmission, but it's a hard transfer (most of the time) and won't pay for itself for a long time. But if you've got nothing, that's the way to go.
ArticCat, you're right about the 120 km/h thing, the wind resistance doesn't play a factor until then, so if you're just going around town, it won't matter.
And personally, I was part of the tailgate post, so I did my own experiment, and found that when it was DOWN i got 15 mpg, and when it was UP i got 12 mpg, so there ya go folks, my 2 cents.
