well measured the cyl.s. today
#1 hole 3.9250
2. 3.9100
3.3.9225
4.3.9110
5.3.9195
6.3.9135
i think #1 & #3 cyl,s. wont come into spec,s. at .060 over now. and my machine shop definatly dont have sonic testing.. also my machineist told me ALWAYS #1 hole wears the most as it runs the coolest and holds tighter specs because of it. says he,s bore over 100 of these blocks and the larger truck blocks are definatly heaveyer castings and higher nickle content blocks.i didnt have time to check the crank yet.
