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So update on this
Talked to engine shop yesterday he said he ground crank that way to save it because of spun rod bearing it was warped, which I figured was the case. He said if I bring him another crank he will grind, balance and and install on his dime.
He assured me that I would never know...
I did check the rods with dial calipers before giving them to engine builder, they definitely wasn’t .020 difference in length. The engine is a 71 out of a cuda I have had for 25 years. It was a standard bore, crank was standard on Rods and mains. It had a spun rod bearing. I informed him to...
Really not sure what can be done to fix it, mill pistons on 5 and 6 about .015 to .018 to match the rest or buy new crank. I already paid a well respected shop a bunch of money and end up with this. This bottom end was all balanced.
Here is a better picture everything is pretty close right side of block 2 and 8 are both .011 down, left side 1 and 7 are within a couple of thousandths, the problem is cylinders 5 and 6 are positive sticking up out of cylinders.005 and .007 thousandths. Decks look pretty level to me not perfect...