Hesitating

[Theseeker152]

I have a 1988 Ex-WSP SSP......I have over 210,000 miles on it. I just had the Fuels injectors replaced, a new fuel regulator, Changed the Intake AirCharge Sensor(It was Very nasty looking), and Cap & Rotor.
When I try to accelerate it still hesitates. It's worse going up hill. There is more power than there has been, but the hesitating is driving me nuts!...If I light foot the gas pedal it does fine except up hill.

Any Help?...