Bought these heads with the intention to build a 402 ls2 but ive decieded to keep my ls1 and forge it so these wont help me any now.. they are brand new with 0 miles on them, never bolted up, only thing ive done is smooth over the sharp edges and swap my PRC Double springs rated to .650 lift  onto them with the springs have 800 miles on them and still look brand new.. need these heads gone fast looking to get 850 for them ...fastest way to reach me is email- chenault77@hotmail.com   these heads brand new with out these springs sell for 900 so this is a steal