I am in the process of welding the header for my ZDZ 80 RV. I purchased the RCS canister and header. The header looks like it is galvanized steel and comes fully assembled. The problem is that I had to slightly modify the offset that was built in the header and made some cuts from the side of the tube so that I can bend a little more so I have less offset. I made a total of two cuts and one of the cuts is too wide to fully "close" as I bend the tube. At the widest point, I have about 3/32" gap to fill with weld material.

My question is, what would be the best way to weld my header appart from TIG welding it, which is hard for me to get done. I have been told to silver weld it and others have said silver solder is too weak for what I want to do and can melt only with the heat of exhaust gases. I am confused...

Thanks for all the help guys.