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I took mine off and had a muffler shop hydraulically expand the headers. Two weeks later I had one pipe leaking. I found a tailpipe expander that you hammer into the header instead of tightening while in the header. It is currently working. If another one leaks (after the high temp silicone melts away) then I will flange. I am interested in the cost to have the flanges installed. I have no idea what shipping to and from NJ would cost though. I am sure I can find someone local. Please post pictures when complete.
I would have been well ahead if I would have welded flanges on from the get go. I am also considering brazing the connection but I could never get the header and side pipe to seperate afterwards. I used an infrared temp gun and the temp at the header to side pipe connection was 685F!!! with a 302. The high temp rtv is only good to 700F intermittantly.
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