i got the numbers off the motor that is suppose to be a ls6 out of a boat but i dont know if it is or not. it has the valve covers on it that says 454 45o hp marine but anyone can put valve covers on a motor. here are some numbers i got off the block 3999288 and 82972 and one of the head was hm454039
if anyone can give me some info it would help me out thanks

LT1,

Here is a site you need to put in your favorites http://mortec.com/

The block numbers seem to be incorrect, the closes one is 3999289 which is a 454 71 thur 79
Have fun with your new found treasures!!!