a 260A is a 5.7 V8 with a flat tappet cam and a 650 CFM carb, in front of a volvo 280 drive would put the motor/drive combination a 1986.
if the drive is a single prop, you use SAE 30 in the engine, drive, tilt, and power steering. if the drive is a duo-prop, then the drive gets SAE-GL5...