71 Dart, buying brakes, ugh

grumpuscreature said
Wagner part number PAB330 will get the front shoes (9"X2 1/2").
Wagner part number PAB329R will get the rears (9"X2").
Hope this helps.

The pics are from the front, the 330's are not the same! if the wrongs shoes are already on their i didnt know, should i switch the front from the 9x2 to the 9x2 1/2? is the 9 in the size determined by the drum(i assume)?