i have a 70 455 that has a chipped bolt hole where the timing chain cover goes, it will still work it didnt crack the block, a regular bolt hole is round like this O the chip looks like this C its missing part of the treads, the block is std bore, i bought it for my stroker (325 plus shipping) but didnt want 2 put 12k into a motor with a chip, the motor is in fairfield CA free 2 teh 1st person who shows up, pm me here

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