The motor mounts that you are looking for were used on full size Impala's from 1958 to 1962 (or a Canadian Pontiac). They shouldn't be too hard to adapt. But the bigger problem that I see, is if you are using an Automatic trans as the 235 came with a Cast Iron Powerglide (read LARGE and HEAVY)and the TH350 doesn't bolt on unless you are using one of the adapters that a couple of our Board sponsors sell (I believe in the $300. - $400. range)or if you are using a Std. trans but then you need the pedals, etc. The Nova would be neat when you open the hood and show off a 235 instead of a 250. You will have a few Inliners scratching their heads.
Good Luck