yes it's a 428 from 1969. date code is Oct 16, 1968 making it a 69 motor. probably from a big car. 6x heads are not from that motor. The original heads would probably be 62's, 46's or maybe 16's. 40 over would be safer than 60 over, but 60 over can be done. Pontiac called them 455's! The motor is probably worth 800-1200. Offer him $500 and bring her home. It's a very desirable motor with lots of potential.
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If it ain't broke, fix it 'till it is
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