Recently put a 6.2L out of a 2014 stingray into my 86 c-10 with a 4l80E built trans and a 2800 stall. Using a stand alone ez-tcu from TCI, vehicle starts and moves. Problem is that it will not upshift until i let off the throttle, also feels like it is not hitting the higher rpm's and lacking power. Any body have any suggestions?