If you want the best headers that will fit with no removing the engine,mounts,suspension ect. go with TTI. These babies use 3/8 thick flanges on the head flange and the exhaust flange, they may require the starter to be removed and the oil filter may need the 90 fitting,( available MoPar Perf.), depending on the size, check it out!
www.ttiexhaust.com. I have Hookers on my Dodge 4x4 and they are sufficient but they are rusting badly and will need replaced in a few years, the flanges are paper thin 1/4 inch or close to it! I use ultra seal gaskets and arp fasteners to help there. I ordered my TTIs thru Mancini racing.