Some of those 07-08 trucks are limited in fuel pressure as rpm climbs. You can check and raise the pressure up top if you plan on turning more rpms....
I don’t know about older 65/66RFE models, the older 68RFE models, specifically model years 2007.5-2009 had a separate TCM and there was communication...
Update: Contacted them via phone and the support has been pretty great so far. Will update with fix when found incase someone runs into this issue in...
Under Spark/Advance Startup Cranking. Make the coolant temp rows 176 and higher all 5 degrees. See how that works out. You're pulling -10 degrees in...