actually, my '79 has those hideous pressed passeneger peg brackets welded right to the frame...worse, the brake spindle runs right through it.
i emailed you a pic for reference...i have no off-site host.
thinking along the same lines of the dude over at SOHC, i did pick up a pair of ally brackets from an '80 F, however, even without the factory brackets, it's not direct swap. heavy as fuck too.
hmmm...
N.C.N.R