does anybody have the greddy blue box running on a obd 1 gsr ecu? if you do can you help me i want to know if the wiring for p28 different from p72 and they are both of them is obd 1
cause my friend said it dont work rite with a p72 obd1 gsr ecu and its cool with p28 ecu

if you have one on a obd1 gsr ecu can you give me the letters n numbers on the blue box
mine says USEG4-F40T04

AND THANX FOR THE HELP GUYS...