BBP swap, 65 Barracuda
my goodness those backing plates are spendy!
you can yoink them off any mid 90's to early 2000's JGC with discs and then source the consumables from rock or [insert your local parts depot here]. some people think that the GC stuff is a little light duty and "upgrade" to the liberty rotors and calipers, i've found it to be sufficient though.
you'll need to get *slightly* creative with the soft hoses to the axle and from axle to the the calipers, but that's straightforward work. hoppy posted the e-brake cable fix that works a treat.
a slight tweak may be going with the smaller 11" rotors and staying with drums out back. it'll have more than enough stopping power and then you can source 14" rallye wheels which would be easier and cheaper to find. 205's all the way around would make the car sit right, as well without too much fuss.