i think they are bat wing pivots for tube axle front ends, i had not thought of using them for independant a arms though.
i will keep this in mind for another build, nicely spotted.
the more i look at them the better they get, what thead is on the stud part and how big is the hole in the bush,
funny thing, the English language, "how big is the hole in the bush", but you know what i mean.
did a search and these used to be made by concours west industries but they are long gone so they are now available from kugul komponents at a better price than given above, $55.00 for l.h. and $50.00 for r.h. unpolished.
check out the vidio on you tube "how to make your own" http://www.youtube.com/watch?v=qTQwtwZWhsI
with these at the ends of your a arms you can make your chassis braquettes parallel to the chassis and a arm construction gets simpler because there are no short pieces of tube to fit the hiem joints into, infact the top a arms could be made completely from a catalogue with no welding at all.
then we could fit aftermarket spindles and brakes, complete with the lower ball joint and it's weld ring, just fabricating the lower a arm to suit the chassis width.
now if someone were to find a suitable bell crank we could have inboard shocks as well. (i'm asking here.)
but i digress from why we are here, TO FABRICATE EVERYTHING FOR OUR CARS!