I have a 1996 gmc k1500, 5.0 v8. I have replaced several parts. When I accelerate hard enough to get to 3,000 rpm my truck will stutter almost like it has a rev limiter. It will also do this in park while just revving it. I replaced, MAF sensor, TP sensor, IAC valve, cap, rotor, plugs, wires, fuel pump, fuel filter. There may be a few things im missing. I am honestly at a loss and don’t know what to do next. The only thing I can think of is maybe clogged cats or trying to get a fuel pressure test even tho the pump is brand new. If anyone has any Idea please share. Thankyou