1994 Jeep YJ

Hi

I recently replaced my cranckshaft bearrings to resolve a knocking sound in the engine. It worked.
But now whenever I accelerate or change gears at high revs, I get a whistling noise. It sound like air in the intake but the whole system is OK.
I feel it has caused a slight power reduction in the engine and also a delay (almost a flat spot) when I accelerate suddenly