W2 headers!

Looking for a set of w2 headers for an A body. Would like a set of TTI step headers, but they aren't making any more till the end of October. I'm not stuck on those, but anything that runs tube through the fender well is off my list. I don't really know what's out there, so what do y'all have? Motor is a 340. Car is a '68 Barracuda. The last go 'round made 507hp, so I'm guessing it should be in the neighborhood of 600hp now. Need some headers...