Carter TQ - VERY rich at WOT...how to troubleshoot?

Congrats on using the best 4bbl ever made!
We know you’re a TQ connoisseur and you brought a LOT of good diagnostic information to this thread (thanks for that) but you discount your own statements by starting with this sentence.


Got 600 hp on the dyno with a 440 & TQ recently, street driver, 900 rpm idle.
Can you share more on this? Specs on the engine? Video of the dyno runs?