I did do this. Tightened until I couldn’t turn the hubs, pressed the brakes a few times, then backed off until they weren’t dragging. 3-5 clicks.
Brake is soft on first press, like, to the floor without stopping, soft. Second press is firm and will chirp the rears, third press slightly...
So, the PO had a 78 front axle with discs installed...maybe in the 80's. Rear drums remain the same...'74. My question is, is the '74 master cylinder sufficient for a later model calipers? Do I need a master cylinder for a '78? SOR shows the OEM master cylinders to be a different design...