I one time had a BMW smack my 65 riviera. The shop said the frame was bent, but the guy claimed it wasn't. The shop rechecked and found that it indeed wasn't a bent frame despite the wrinkle buckle in the fender. However, that only saved him about $100. Point being that the body shop knew what to measure how. So you might want to ask a body shop.

But the real question is what frame specs are you asking about? Body mount locations? Frame width? Frame Length?