Bad knocking under feet

Welp id have to agree. I think thats the issue. So now how should i go about fixing it? I know the easiest way would probably just to hit the pipe with a mallot or something. I doubt this would work, but i just put on some header tape in between the pipe and frame to insulate the noise.

Soon we will put headers on it, but that will be a challenge to find some cool ones that fit an a body with a 360, with power steering.

Thanks for all the help and suggestions.
I don't think I'd beat or wrap anything. Getting that pipe down a little lower would be the correct way.

Actually, from going back and looking at it, that pipe needs to be remade. Whoever made it, totally "missed" the exhaust pipe nook in the cross member. All it needs is to be bent differently so it fits up into the cross member. They totally missed the boat with that one.