Don't Necessarily have a part number for the pistons
Found on quite a few engines 1967-1990's I'm sure this is one of the earlier ones based on the design
You will need to find your own key and nut for the steering wheel (should be able to use your existing parts)
I am unsure exactly what part number this is as the website that I usually reference for this does not have the number for this one
PleasureCraft: R002001
OMC 0984056 0984057 0985704 Cobra 3.0L 5.0L 5.7L Solenoid Cable Tilt Trim Cable Engine Mounts Don't Necessarily have a partItem Details Works with OMC Stern Drives Cobra From 1986 1989 I. E. 120hp,140hp,165hp,170hp,190,225,235 & 245 2. 5L 3. 0L 3. 8L 4. 3L V6 V8 5. 0L 305 5. 7L 350 400 800 350 180hp (may work on many others) Solenoid To Motor Cable Assy Assembly: 984056, 0984056 Trim & Tilt Cable Assy. Assembly: 984057, 0984057, 985704, 0985704 1986 1987 1988 1989