ok so my grandpa has a 71 mustang that has been sitting in his garage rusting away and such for 20 years. We are finally thinking of restoring it . But i am confused on some of the information that i have found and what my grandpa has said. He says that it is a 302 boss. But from what i have found on the internet the boss' only came in a 351. So i am at a loss of words on what is right.....