perfect.ta

Hi i have a 99 m6 ls1 camaro . Current mod are ms4 cam kit with a set of 243, ls6 manifold full bolts on ,42 ib injectors . Well i was about to shoot 200 shots of nitrouse on the stoke bottom so i have just opend the heads and found some minor scratch on the wall of the cylenders . Though the engine was having no issues so my mechanic told me that this will cause an engine failure . So am thinking of reinforcing the rotating assembly and rebuilding this engine but where am from we have pritty bad engine shops so i was wondering what parts do i need for this set can some one guid me plz on what rotating assembly should i go with for maybe a 300 shot and what sleeves should i go with if i should . And would a stoke ls1 block be capable of this much boost . Thanx