I have a 78 k20 with a 10 bolt front axle. Im going to be doing the breaks. And I was shopping around for rotors. Well Im not sure which ones i have. I hope its the press on to the old hub ones since there only 36 bucks. The other is rotor with a hub one peice. Those fuckers are 130 each! I tried to google information on the gm 10 bolt front axle. But didn't find any information about the disc brakes.