You have to look behind the driver side head on the block. There will be a number stamped on the block. LS6 blocks have the number #12561168. If its any other number, its a LS1 block. You will need a tiny flexible mirror and some help more then likely.
hey bro how 2 tell if u got a ls6 block i got a 01 ss 2 but i dont know if it is a ls6 block?
