If it was me I'd go back to stock jets and then try to find the real problem. The stock jet size should be fine for that carb so if you're going lean at WOT then you either have a problem with your power valve circuit, or you have fuel pressure problem at WOT, or you have some other problem.

Sounds like you fixed some unknown problem by putting big jets in the carb and now you have multiple problems. Best step is to go back to box stock jetting and try again. Get it running smooth at idle, then make sure it is working for low speed and cruise. Don't worry about WOT until you have everything else working just fine. Then you can focus on one thing at a time.

On a street car you shouldn't adjust AFR at wide open throttle with the main jets. Drag racers do that as a short cut but for a street car you need to adjust WOT by using the power valve circuit. That is what it is there for.