I'd go with what you like best. The big ones would likely be used in severe service trucks like farm vehicles, mining trucks, desert use, heavy hauling, etc.

How many miles do you expect to put on your truck each year?

As you see, your truck never had a filter in the first place and the engine seems to have survived ok. Anything you install now is just an added bonus.


1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)