Just in case you can/do go with the 79 T Bird setup (check the interchange book as there are other years/models that will interchange) the 79 Bird MC works very well, even in a non-power setup. Although mines not on the road yet I did this exact swap on a 63 1/2 Galaxie a few years back and it does stop really well.

Again if the T Bird stuff will work for you, as I recall using Granada spindles can also be used and will give a 1-2" drop if I call correctly.