patrick's list them as 2.153" vs 2.030
i was at the shop a bit ago, and my '61 block measures 1-4; 1.965, 2.030, 2.090, 2.150. the cam that came out of it is a gm 52 3836127. also, the ref book lists the rods @ 11.474, but mine are 11.31. diff length bec it's a '56 head?
scratch-scratch-scratch
