help with ECM and prom

[ECMnut at aol.com]

AMERSON,
I can't find a match for the chip you got from the dealer.  Must be
newer than my book (96 ish)  Your original ABTR4763 is for 
a 1988 5.7, VIN "8" Chevy, which sounds right.
HTH, Mike V

> I have a 88 Vette with 1227165 it has been upgraded to a 16198259 the prom 
>  that was in it is ABTR4763 and I had a GM dealer order me a new prom so I 
>  would have one to play with the programming, I thought it would be the 
same 
>  numbers on the proms but the new prom # is ABTR4762. The new prom which is 
>  supposed to be the same as the old prom at least that's what the dealer 
told 
> 
>  me, runs better than the old prom. I am lost has anyone worked with this 
> PROM 
>  or do you know anything about the prom #'s. The new prom runs fine I'd 
just 
>  like to change the temp settings. There was someone here that had 
mastertune 
> 
>  for an 87 Vette with the 4+3 trans as for as I know it is the same as my 
88 
>  with the 4+3 trans. Would you send me a file to try from the 87. I run a 
160 
> 
>  stat. some the fans at on at 185 and off at 175 is good.
>  thanks 
>  AMERSON
>