5.7 Hemi Racers

I have a stock 2004 5.7 Hemi "TTI headers" from a RAM 1500 in my 72 Duster I use for bracket racing. Over the years I have had some success racing a carb car and was conned into EFI Hemi. This was a complete transplant, new wire harness, ECM fly by wire pedal, etc. The problem I have is the car is not consistent. Does anybody out there know what can be tweeked or modified to get this thing to run the number or within +/- .02? I have been bracket racing for a long time and regret going the EFI way but am committed $$$ having spent the time and money. If you suggest a Diablo Trinity, what parameters would be worth tweeking? Not used to going out in round 2.

Thanks