I hate doing work like this, it is not to my typical quality standard but I am working on getting the 8.0L Viper V10 test fitted into the 73 dodge charger and his is what must be done temporarily. 3” 304 stainless Vband to very old and dirty mild steel even after cleaning. 309 3/32 rod to help with the gaps. This header was made by hand in the dodge factory so it is nowhere near round where we cut it.