salvage yard parts
The last time I was at a yard I notices several vehicle that have parts that could be used, they looked beefy enough. I'll have to look at your suggestions the next time I go. When splicing tubing I usually try to find a solid bar or , bolt shank to fill the tube and drill some 5/16 holes back a ways to make rosette button welds as well as the circumference, When needing a filler , instead of nails i take a stick rod and hammer it so all the coating comes off, the theory is that the metalurgy is more compatable. MY A roadster project has home made 4 bars that the original builder used toyota tie rods that are about the size of my pinky finger. I have been able to order Dom tubing reasonable priced from a local fabrication shop . I just have to get the wants in so they don't have special shipping, and can be delivered with their regular orders.