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just sonic the block first..
i have factory 72 360 block bored.040 ,factory crank and polished factory rods..
light pistons and balanced assy. no filler and stock caps...line bored..
running 6.67 at 3410lbs.built this motor in o4

Yes, my block sonic tested real good. It was an E58 block if that makes any difference. Had about 30 - 35 runs on it before I pulled it down a few weeks ago due to a burned piston. It is going back together right now. Bottom end looked great ( no cap walk and bearings were reusable )and will go back together as is. Had a few scores in the bad hole so I had to go another .010" over to 4.040" to clean it up. I know the block is the weak link in my build and 30-35 passes isn't much so - IMO, the verdict is still out re: reliability, but so far so good. I have made a few passes with as much as 25 lbs of boost, but I'm thinking of limiting it to around 15 lbs in the future with a smaller blower pulley. Pray for me .

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