[rotorwrench]

A person needs to find a helper to rivet anything on a model A frame. It's too large and ungainly to do it by yourself unless you know how to set things up to your advantage. Bucking bars have to be heavy for steel rivets and a person needs at least a 5X rivet gun to buck them down. They could be driven with a big hammer and a special made rivet set but that's a lot of work. Heat the buck tail with an oxy-acetylene torch and beat on it till it's either fully bucked or till it work hardens then heat it some more & repeat. Rivets are usually bucked from the head side but there is no hard and fast rules on that. Rivet tails are cut to extend out past the joint by about 1 and 1/2 of the diameter of the rivet. They should buck down to 1/2 the diameter of the rivet. Some buck tails have a rounded pan shaped tail in similar shape to the heads but that would take a special preparation of the bucking bar to get that shape. It would be optional to do that on these frames but some rivets were done that way. Buck tails are flat in aviation riveting methods.

There is a good article on frame riveting in one of the Restorer series of books. They show some of the bucking bar shapes & sizes that work well plus a good run down on techniques. Ford used some great big hydro-pneumatic squeezers to put them together back in the day.