And 12 Port, the math on 261 = 235 stroked like the Cadillac build doesn't work out. 3.5625" (235 bore) with a 4.125" stroke (a la Cadillac 261) becomes 247 cubes. Overbore it 30 and you get 251. Overbore it 60 you get 255.
And when you bore it .100" over you get 260.6, or 261.
