Showing the difference in the short hoods of Alco's C-424 and C-420 engines. .

GB&W #319 (in the foreground) was an Alco C-424, while #323 was a C-420.

The C-424 had a 16-cylinder 2400 horsepower engine, while the C-420 had a smaller 12-cylinder 2000 horsepower engine on a similar frame.  Hence, the C-420 had a longer short hood.

The C-424 shown in the photo was an early production unit with the battery box behind the cab, forming a rear step. The C-420 has roughly the proportions of  the earlier RS-11, but with no notches on the low short hood and only shallow notches on high hoods.

The photo also shows the difference a faded paint scheme can make.  Besides the paint which is almost turning pink, the GREEN BAY ROUTE herald is faded out on #319.  #323 has a newer paint job -- although it can't be seen in this photo, it has the new "serif font" large GBW on the long hood sides.

Both of these units came to the Green Bay Route second-hand: #319 was originally Pennsylvania Railroad #2415, while #323 started out as Lehigh & Hudson River #27.  They came to the GB&W in 1980.