RayX-7

Hello All,
I have a swapped FC, using a LT1 sbc, and I am having trouble trouble diagnosing my lean AFR condition. Any advice or helps- I’ve checked the O2’s and spark, which both have showed within spec and working. I’ve disconnected the knock sensors, one at a time, in case they were causing ecu to retard timing. I also checked my fuel injectors to make sure they were getting signal pulses with noid lights, and now I’m thinking the issue is in my wiring harness. Does anyone know if injector signals have a short in their wiring, will their pulse voltage drop and cause lean out? The issue is isolated to my driver side bank, so I’m confident the issue has to be within ecu or ecu signaling to my injectors, since it’s a lean issue. I’ve been chasing my tail for over a year trying to figure out how to fix the issue, without just throwing more parts at it. I have a new cap and rotor in the MSD Opti, new wires and plugs, new injectors (moved them to different cylinders also), and all sensors have been replaced - ie MAF, MAP, knocks, IAT, coil… I’m lost and need help, please. FYI- I am running a MSD 6AL ignition system for spark control. Thanks ahead of time