brake conversion on ebay

I just found these 5x4 conversion with 7/16 studs seams like a great kit, has anyone used it or know anything about it?
MOPAR DISC BRAKE CONVERSION A -BODY ONLY 65-76 ( 4.0 SMALL BOLT CIRCLE )
( 221204799583 )

It's a stock 73+ disk set up with redrilled rotors and adaptor sleeves for the small upper ball joints.

Nice that it's all there, but if you can find a set of F/J/M spindles and caliper brackets at your local yard off of a 5th Ave or Diplomat (they had them all the way up to '89), you can do the 73+ swap, with all new parts except for the spindles and caliper brackets, for well under $500 if you're careful sourcing your parts. You can get the ball joint adaptors from Dr. Diff and keep your stock small ball joint UCA's. That leaves you plenty left to buy new BBP rear axles and brakes to match the front, and you'd never have to worry about finding SBP rear drums again.

In fact, you can buy the same kit for about $500 from Dr. Diff, the only difference will be that you'd get BBP rotors. http://www.doctordiff.com/10.95-front-disc-brake-kit.html Which again leaves you enough money left over to buy new BBP rear axles from Dr. diff, although if you bought the BBP rear drum kit new from him it would set you back a little more. Again, I'd just get those from the local yard, they came on darn near everything up until the 90's.