that's a good wheelset for a bike friday pocket rocket or mini velo, but not for a downtube nova. those wheels are 451mm. you need 406mm wheels to be compatible with the v-brakes on your bike. unless, that is, you want to spend more money buying v-brake adapters, long reach v-brakes, or calipers, or even possibly a new front fork..

i have a few 406 wheelsets in my "inventory" (ugh). i'll have a look. i may have something you can use.