Tom Mansfield is looking for a replacement rod and piston for this 368 cu in Lincoln Engine
Wikipedia describes this engine as the last in a line of Ford Y Block engines built between 1952 and 1963. Early engines seem to have been designed to use in both Ford and Lincoln heavy trucks with engine capacity and horsepower increasing steadily through 1955 – 57 when the engine appears to have been devoted exclusively to Lincoln and Mercury cars.
Topping out with the 368 cu in (6 litre), the engine produced up to 300 horsepower with a maximum torque of over 400 ft lbs.
If you don’t have the parts, perhaps you can give Tom a lead on possible sources.
Contact Tom by email at firstname.lastname@example.org