What you need is 24lb injectors, 70mm TB, PMAS mass air meter calibrated for 24lb injectors and an Adjustable Fuel pressure regulator.
+1
I wouldn't have even attempted such a swap on a speed density car. First thing i would have done is convert to MAF.
I'd also give the engine a good spray with some carb cleaner to check for vac leaks. Which Intake gaskets did you use to seal the lower onto the heads?