'72 into a '67??

..............I was going to post........see AJ below. I looked it up on Classic industries, and it appears the 67--72 might be hole punchings only. But the motor hole is in a different spot. I think you'd have to make a patch

I stole these off Classic Industries site, hope they don't mind

http://www.classicindustries.com/shop/mopar/a-body-dart-1963-76/parts/body-panels/firewall/