I would like to find terminal id’s or pinouts for both the 1227747 ecm and 16147060 ecm to see how much different they are

My 91 ecm is a 1227747

Haven’t looked at the 91 but the 92p30 has a 16147060 ecm

Definitely gm transmission

Glad to have found this forum hope I can learn some great stuff here
My project is a 1991 Silverado C1500 2wd
my donor engine and trans comes from a 1992 Fleeteood Bounder 7.4/4L80E