Pinky , all the early / narrow ( not E8) Sherman track pads were interchangable , you can find pictures of plain rubber block , rubber with chevron ( the arrow V ) and even some steel types all mounted on the same tank as well as being used as spares . The 3 pad bracket can mount vertically or horizontally on the glacis plate , check a few photos of Brit or Canadian units , the Yanks never used it as it was a Brit piece of kit ( now someone will find a photo of a Yank Sherman with this mounted , lol ) . Remember , it was the teeth at the end of track that held it together , when mounted flat in the rack the pad chevrons could face either direction , again check photos . Judging from your picture of the track rack , the Warlord track looks to be the all metal pad ( thin metal chevron ) and the Rubicon , the rubber pad with the large rubber chevron . There were 12 styles of narrow track ( 3 styles of rubber , 5 steel with metal chevron and 4 with metal 3 cleat pads ) Only the flat rubber type used the groucers , those things mounted on the side of the M-10 and the turret of the M-5 Stuarts , if the tank had steel track it didn't even mount the groucers in the rack , thus saving weight , the flat rubber tracked Shermans kept the groucers in a compartment under those little air scoops on the rear engine deck