ripper

heres my car 1996gt 4.6 i am supercharged with a procharger puttin out 12lb of boost,stock manifolds,hpipes, tremek 5sp trani, aluminum d/s, 3.90r,welded rails,suspension,g force d/r's,trickflow plenum and 70mm t/b,42lb injectors, adjustable fuel pressure (which im thinkin aint right cause im gittin 40 low and 80 high) high flow ma, also im methanol injected. I bought this car this way. All these things i had to find out on my own i got no info from previouse owner. Who knows what else is in there i dont know about. I need headers just wondered which way to go.