92 Chevy 1500 swapping a 4.3 to a 5.7 carb what will you have to change beides the motor mounts and flywheel and clutch because its a 5 speed what about the pullies?

You will also have to change the driveshaft because the v6 is shorter then the v8. Not the mention that the bell housing might be different too. I am not sure what you mean by pulleys? The ones on each engine should remain with each engine. Not many pulleys on different engines are interchangeable.