383 4spd Dart Sport

I run TTI 1 3/4" headers on my 383 4 speed Dart. I had to run their z bar. The stock z bar can be used if you but the headers from Schumacher (sp?). He the guy who sells the conversion mounts. You then can send them to the guy from Accurate Exhaust who modifies them to run stock z bar. By the time that was all said and done, you have about a grand in the headers or more with recoating. The TTI's are expensive too, but cheaper than the other route. Hope this help