The car is all original with 55k miles - Slant Six / Auto. / 7 1/4" Rear / Kelsey Hayes Front Disks
I bought 4 adapters, and with shipping, they cost me $149.
OK....
Find a '73 up A-Body with Disc Brakes and a 7-1/4 rear and snatch the axles they will be BBP - Direct replacements and you lose the rear spacer/adaptors. As for the front the Scarebird conversion is probably the cheapest SBP to BBP converson.