Hi, Guys -
Just starting to learn about the fascinating world of GM ECMs ...

Have a 1983 Trans-Am with the 305 Crossfire engine.

ECM ID number is 1226026 and PROM has the following markings on a sticker:

DELCO
ASY
5597

Anyone know what the "PROM mask ID" is for this ECM/PROM ?

many thanks