Slant 6 Headers

hi, i need some help !

I come from germany an own an 71 Valiant with a 170 Slant Six.
I bought the header you see on the picture for it. The problem is that
there is nearly no clearence to the ground when it is mounted.
I thing its not for my car. can anyone tell me for what kind of car it is ?

greetings Stefan, Hamburg
(excuse my english)

http://img180.imageshack.us/img180/4338/headersmediumia3.jpg