1997 Chevy Truck Strange noise and stutter

I recently had the clutch replaced. I had the plate and secondary replaced due to the springs on the plate breaking. Now, when I get around 1.5-2k rpm, every once and a while the truck will stutter. Feels like tapping the breaks many times, hard to really explain. Also, just started to squeak while in gear and pressing the gas. No squeak when not pressing gas or when not in gear. Must be in gear and press the gas. Also have lost a lot of power. I have replaced all spark plugs, wires, and belt. I know that I need to replace fuel pump since fuel gauge readings are sporadic. Also need to replace catalytic converter; was rattling, but has stopped recently. Any assistance or advice is appreciated. Thanks!