Dodge Dakota Hedman Headers on an A-Body?

I just recently picked up a pair of dodge dakota headers that fit 1992-1995 pickups with 318 or 360 engines. They are an odd slim design in my opinion and I was wondering if anyone has attempted to use or mock this up before. My car is a 1973 dart sport with a 318, ps, pb. Thoughts opinions comments, horror stories, anything helps.

here is a look to what they are and look like.

http://cgi.ebay.com/ebaymotors/New-...r_Truck_Parts_Accessories&hash=item414b539cd5