'70 Cutlass, Headers that will fit?
 

I have a 70 Cutlass. I'm somewhat confused by the difference between a Cutlass Supreme and a Cutlass S. My car has the "S" on the door panels. I'm wanting to put some headers on my car but don't know which ones to buy. It has the 350 engine with AC, auto(on the column), ps. Any help or suggestions would be appreciated.