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FE Technical Forum / Re: Cylinder Wall Thickness Sonic Checked My 428 CJ Block
« on: May 20, 2024, 09:53:48 AM »
I have a 428CJ "C" scratch numbers matching engine that I just bored to +.030" over, and did a fresh sonic test that has cylinder walls capable of +.065" overbore and still have at least .125" everywhere. The block is dated 8G23 which should be a '68.5 dated engine. I believe that those real CJs have decent cylinder wall thicknesses remaining if the owners used antifreeze in their engines from the beginning. Joe-JDC