I've got an '87 GMC V2500
Engine is a L05, NA4
Here is the calibration information:

BCC= AFBW3542 Scan id= 4401 Part number= 16073539
Release date= 11/05/86 Engine size= 5.7 Trans Type= Auto trans
ECM/PCM: ECM #01227747
Used in trucks: GMC
Possibly used in:
R20,2WD,3/4 TON R2500,2WD,3/4 TON R30,2WD,1 TON
R3500,2WD,1 TON V20,4WD,3/4 TON V2500,4WD,3/4 TON
V30,4WD,1 TON V3500,4WD,1 TON

Options:
With L05 5.7L GAS 8 CYL (5.7K) V8 TBI
With M40 AUTO 3 SPD TORQUE CONV VAR 1
With NA5 FEDERAL REQUIREMENTS
With NA6 ALTITUDE REQUIREMENTS