Even better .. why waste money on a new
lens that won't give you much of a benefit .. and use that money instead on a better camera!
A D7200 ... or even better! ... a much cheaper(now) D7100 that will not only AF when you need it .. but also produce much better images than the D70 is ever likely too.
Another camera option to consider in this price range could be the venerable D700!
Second hand these tough old beasts are more than capable, and allow you a few more framing flexibility options .. at more than a reasonable price.
Other cameras that will AF with this
lens are:
D80, D90, D7000, D300/D300s, D600, D610 and higher.