I'd like to reply to the following:
Gilbert...thanks for your comments and I'll post some pics of my 66' Mustang Fastback that is under glass later this week. It was my first build after 40 years away from building and it was a tough build in so many ways as I had so much to learn again.
a. The brass/aluminum were purchased at Kranzels Hobby Shop in Lemoyne, Pa. and also my local hardware store. Hard to find sizes/materials were purchased from Caboose Hobbies.
b. I use tix silver solder and an American Beauty resistance soldering setup. It's great for the tiny / hard to solder areas.
c. The a arms were fabbed from brass tube and the "rocker arms" were fabbed from some misc. MAS photoetch pieces.
Tom: Tix solder and the main framerails are tapered 3/16th" brass rectangular tube which I had to shape and then fill in with solder at the ends of framerails. The drilled support rails are the same. Various sizes were used to do crossmembers etc. The front shock / rocker towers are 3/16th SOLID brass that were shaped by hand and then drilled / cut to accept the PE rockers.
Hope this helps. Tim