Exhaust manifold gasket

I've also used remflex on my 66. I got mine from Amazon and had a similar issue like above with whoever put it in the box. It was crushed on the corner. Amazon sent a replacement and it was perfect.
It doesn't take much torque when put on so pay attention to the instructions. I was thinking I hadn't even torqued it enough and was tempted to go a little farther but didn't. It's been great going on 2 years now. It was well worth the extra dough.