I'm going to tentatively add some stuff from my thread on my new '62 L, subject to correction. And a few things I'd like to see dates for.
Perhaps Roger can add in info on bearing caps?
"1922: The Gravely company was incorporated
1923: First production D Model built.
1924: Oldest known to exist D Model built.
1925: Wheel Design change on D Model.
1927: D Model switches from water cooled to air cooled.
1928: D Model engine design changes
1960: the Gravely Tractor Company was bought by Studebaker corporation for $12.5 million
1963: L model hoods changed from angular bent style to stamped style.
1964: and later L series had rectangular axle housing ends as did the Swifty 63's.
19? L models changed from oil bath to dry element air cleaners
19? L models changed from cast iron rear facing to aluminum bodied front facing carbs.
19? L models changes fro the "regal" or "sunrise" red color scheme to "chevy engine orange" and off white
19? "Chevy engine orange" changed over to "Mustang" orange. (add other names)
19? L models were equipped with high pressure oiling systems
19? L models went from exhaust cams with a protruding end to one that was flush with the engine case
19? L models switched from spring style valve covers to the style with covers (also info on the 2 types with covers?)
Gravelys: 1951 L, 1952 L, 1954 L, 1956 LI, 1961 LI-SR, 1962 L, 1962 LI, 1963 LI, 1965 L8, 1965 LS, C 10, 524, 5460, 8102.
I can quit any time I want. I just don't want to right now.
The rest: 1969 WH Raider 12, 1983 WH A-111, 1985 WH 314A, AC 917H, 1978 Ford 2600, 1978 Ford 4100, 1975 Ford 3550 Industrial, 1959 Farmall 560, 1949 Case VAC, 1951 Case VAC Eagle Hitch, Troy Bilt Horse, Troy Bilt Pony. Mowers, rakes, balers, and far too much other old junk to list....