I ran some guestimate numbers on those rims. Since they are rated for 1000rpm max, you're looking at about 95-100km/h with the 14 inch rim depending on the sidewall height of your tires. So you're a little short of your top speed requirement.
You also won't be able to hook them up to a junkyard knuckle (aka upright) - you'll be fabbing your own, which means you'll be fabbing your own suspension parts unless you're really clever and can make a knuckle that joins these hubs to an existing suspension.
Personally, i'd shy away from hub motors. There's not much lost in using a front motor and a rear motor with a diff at each end (or a double-shaft motor if you can find one that suits).
They are also only rated for 96V, but the mfg says they'll accomodate whatever... if you want to pay for it
