Early bays have drum brakes, crossovers and lates have discs at the front. Some have servo assist. I did note your pedal was hard, but moving the bus around found the brakes ok and I wasn't looking for more trouble and you hadn't mentioned it! Obviously didn't have to try them in anger moving if 30 feet.
Check and make sure your front discs don't look like this... The pads had worn right down and the discs had glazed from the heat... you can see how reflective they are!!
i do have recent receipts and been done before i bought it those parts seem well maintained i will check the pads when i get a mo