Disc Brake Conversion Failing

thats exactly what I was thinking, I called up the so called manufacturer stated that the product number was indeed for a disc/drum application. what's more interesting is that the original MC actually has a significantly smaller bowl up front and it's a factory drum/drum application. the old style with bolt down the middle of the wing on the cover.
I don't care what the online or voiced description says, I think it's wrong. Call Dr Diff. He can set you up with a correct one.