Woog - A check of the 1965 Chevy Truck Data PDF under C10s shows the correct brakes to be 2" X 11" as BC mentioned. A little further checking for C20 and C30 models shows the front and rear brakes on the C20 (3/4 ton) to be 2-3/4" X 11" and the C30 (1 ton) front brakes also were 2-3/4" X 11". Sounds like you got the typical parts house mix-up on the 1st replacement set you got, or the parts counter folks selected the wrong (C20?) model truck when looking them up. Glad you got it resolved! thumbs_up


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
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US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)