Problem reading original EPROM

[Marteney, Steven J.]

Do these things have a security bit?  I tried to read the original EPROM for
my 165 ECM (89 F-body 350 TPI) and the programmer keeps giving different
checksums every time I check it.  The code is APYU3516.  What should the
programmer be configured for?  The chip doesn't have a recognizable part
number (LAE8824).  ECMGuy's page says it is a 27C128.  What am I doing
wrong?  Any hints?

Thanks in advance,
Steve Marteney
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