you can machine down the drum spindle to fit OE brackets for very little, and pick up some brackets from a salvage yard, or buy some. i have seen them for as little as $80/pair. then you can use the proper rotor, and all other brake parts listed for a '69 firebird.
--------------------------------------------------------- most metric calipers are low-drag. i wonder what kind of "re-working" they speak of. low-drag calipers have a seal which is cut at more of an angle, and retracts the piston more. they require a step-bore (quick take up) master cyl, or a residual pressure valve to negate this effect, which would give a low pedal with a conventional master cyl.
