Your engine code breaks down as follows;
F = Flint Engine Plant
11 = Month (Chevrolet used the capitol letter eye as number one)
03 = Day
J = Standard issue 235 6-cylinder used in 1/2, 3/4 and 1 ton trucks from 1957-62
To get a better idea of what year the engine is you'll need to look at the casting date found just above/behind the starter motor. It will be a letter with 3 or 4 numbers.
Your chassis serial number H54O008362 breaks down as follows;
H = 3100 1/2 ton truck
54 = Year
O = Oakland Assembly Plant
008362 = unit number starting with 001001, so you have the 7,362nd unit out of the Oakland Plant for the 1954 model year.
Mike B
