ECM numbers questions

[firemedicsafd]

I have 2 ECMs from all the parts of my 82/88 k5 project. The ECMs have the same ser# 1227747. They both work and allow the truck to run neither throwing any trouble codes. Neither computer came from the body or frame i used. That is because the frame and drivetrain was an 82 while the body came from an 88 but the wiring was cut right before the comp and i replaced all the wiring from a junkyard find. The other numbers are diffiernt though. What do they mean?

One has 1227747 AMUR
86AMUR K381301037

The other has 1227747 ASDU
86 ASDU K301642404

Which one would be best for my 88' with a TBI 350/ 700r4 otherwise stock vehicle plus 6" lift and 33" tires. Thank you!

 

[4X4HIGH]

The computers are the same but the AMUR and the ASDU identify the chip. You need to make sure that which ever chip you use came from a truck with a 700R4 so the lock-up works properly.

 

[firemedicsafd]

Is there a way to do that by those numbers? One of them came with the wiring harness i bought for an 87-88 TBI from a junkyard and the other i dont know about.