What model ECM is this ?

[Team ZR1]

Hi,
     I have just started getting into this and am green as you can be ...

The ECM in my Snakeskinner ZR-1 Corvette has these numbers on the PCB towards
the end where E-prom sits.

By barcode : 309023101908316

Corner of PCB is : IE315 P-5

More towards center : 61C315 P-8 ( I think its an 8 )

So which model is it, what processor does it use ?

Also I downloaded this disassembler off of the TunerCat website and I can not
tell if its disassembling correctly.
Which proocessor do I choose and is there any thing I have to change in the
setup screen ?
Can I tell if the output code is correct ?

Thanks,
             John Rovner