(quoted from post at 17:05:09 12/14/16) Does your plow use four bolts on the share or just three. If they have four bolts they are 619. Most 4340 plows are 619 bottoms but the moldboards are 419. Early 619 bottoms were a straight landslide but later had the offset landslide. you need to use all offsets or straights but do not mix them. The bolt pattern is different between 419-619 slides. You can compare yours to a diagram at Shoups or Wiese to check for sure. Should also be a part # on backside of landslide. hope that wasn't too confusing.
Here is some info from Rangeline Group: (http://rangelinegroup.com/moldboard-plow.aspx)
Note: The website has a nice table format but it gets all squished together when copied into this message. I believe that the OEM numbers you are looking for are [u:90b5f6b1d1]underlined[/u:90b5f6b1d1]
Oliver R419 & R619 Series:
[b:90b5f6b1d1]Part # Description # of Bolt Holes Size OEM# Weight/ea.[/b:90b5f6b1d1]
R41914 Moldboard (5) 7/16" 14" - 5/16" R419-14 27lbs
R41916 Moldboard (5) 7/16" 16" - 5/16" R419-16 30lbs
R41916L Moldboard LH (5) 7/16" 16" - 5/16" R419-16L 30lbs
R61918 Moldboard (6) 7/16" 18" - 5/16" 34lbs
LOL144 14" Rock Share LW (1) 1/2" (3) 7/16" 14" - 3/8" HD14FCO, 220013BS 42lbs ctn/6
RSO144 14" Rib Share (1) 1/2" (3) 7/16" 14" - 3/8" 110013BS 42lbs ctn/6
LOL164 16" Rock Share LW (1) 1/2" (3) 7/16" 16" - 3/8" HD16FCO, 220016BS 47lbs ctn/6
RSO164 16" Rib Share (1) 1/2" (3) 7/16" 16" - 3/8" 220016BS 47lbs ctn/6
LOL685 Rock Share 16"/18" LW (1) 1/2" (4) 7/16" 16"/18" - 3/8" HD18FCO, 220024BS 52lbs ctn/6
RSO185 18" Rib Share (1) 1/2" (4) 7/16" 18" - 3/8" 2200224BS 52lbs ctn/6
WO9 Shin (2) 7/16" 12"-18" - 5/16" EP7490C 21.5lbs ctn/6
WO9L Shin LH (2) 7/16" 12"-18" - 5/16" 217404BS 21.5lbs ctn/6
[b:90b5f6b1d1]270W Landside (3) 7/16" (1) 5/8" 1/2" [u:90b5f6b1d1]218270B[/u:90b5f6b1d1] 56lbs ctn/6
270WA Landside new style, (3) 5/8" (1) 7/16" 1/2" [u:90b5f6b1d1]10128935[/u:90b5f6b1d1] 57lbs ctn/6[/b:90b5f6b1d1]
(use 058UV wear pad)
058UV Wear Pad (2) 7/16" 1/2" 22lbs ctn/6
TBUV Trashboard (2) 3/8" 5/16" 31.5lbs ctn/6