yes i do have a plate for the 235-261 engines, i made them way back in 1990's when i have checked them after boring and honing them they are about .002-.003 thousands out of round,when you install your head on your engine they will come back to zero. if you put a torque wrench on the crank when you have installed the pistons and see how much lbs. it takes to turn over the engine without the head on it you will see about 38lbs to rotate it, then torque the head on it and check it and you will see it drop to about 32 lbs. thats what you want to see.holes are round under torque and great ring seal.you have to have ring seal first before you add any other stuff like cams and manifolds headers and such,and valve seal too.

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1936 1.5 wrecker,1937 gmc coe,1939 Chevrolet coe,1942 4x4 coe, 1942 coe,1946 dump,1947 2 ton dump,another 1947 2 ton dump,1950 coe,1967 c30,1937 cat 22,1936 Chevrolet 5 window foremans coupe, 1914 ford speedster.