Maybe I'm missing something (as Usual) my clipping has no effect on the column widths.
tell application "System Events"
tell application "Finder"
tell front window
if current view ≠ list view then
set current view to list view
end if
set bounds to {1000, 23, 2075, 999}
tell its list view options
width of column id name column
set width of column id name column to 900
set width of column id modification date column to 141
set width of column id size column to 97
end tell
end tell
end tell
end tell