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Gallery and Picture Archive
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"Comparison between crankcase front covers"
both show IH part# 351674R1
In the earliest Cubs, we have observed the crankcase front cover shown on the left. In 1948 and later Cubs, we have observed the crankcase cover on the right. There was not a part number change to reflect the design change. In addition to the face design change, it also weighs approximately 12 ounces more.
Cast dates of the covers show:
left, 1947 Cub, 4-22-Q, and right, 1948 Cub, 3-8-R.