i salvaged a head from an ls block i bought..the block is trash. i plan on boosting this and doing a mild build. looking for around 250-275whp. i plan on doing the head first as its..what i have right now sicne i need to search for a new block. i was planning on getting the head port and polished, can anyone reccomend some good valves,retainers and etc..also some good cams. as the block...if i find a cheap block in good conditon,i was thinknig of keeping it stock. any help or advice is appreciated..thanks