[ctvpa]

Very hard to weld cast. You have to heat the whole piece in sand, and get it hot, 400.

Now think real hard; you, your family, your friends & loved ones, are going to be going 40-50 miles per hour down a highway in this. You're willing to have the piece holding the whole thing together to be some plastic out of a tube?

I would defer to an expert welder, not some guy like me with a MIG. But also someone with experience in 80 year old metal restoration.