Fully restored would have put a 289 in it, but the 302 shouldn't hurt you too bad on the value. Just off the top of my head, depending on how well the restoration was done, average price would be $20k-$25k. More if done really well, less if shortcuts were taken. I would suggest contacting a couple classic car clubs in your area and find out where you can take it for a proper appraisal (will cost you about $75).