Re: 3/4" o.d. tubing
"03-78" (date code?) Made in America and it was an odd size. The CroMoly tube is what I have used as a frame builder a piece of it with .065 wall thickness is not going to bend and works for most BMX bikes. The Murray and Huffy from that time frame were not worth much and the steel was junk. I may be jaded from working in bike shops a lot back then.
LennyHarp of Lenny's Bikes & Things
The true value of a man is not judged by what he has, but rather by what he can do without.
"We are what we repeatedly do. Excellence, then, is not an action, but a habit." -- Aristotle