K guys i need alittle info. doing a single turbo build and would like to use my alum ls1 block. So my question is how much power would i beable to throw at a fully studded alum block. shooting for the 800 to 900hp range. is this possible or should i just go buy a cast block and be done with it. thanks for the info

 

What year is the block? 97 & 98 are not as good as later versions.

 

the number on the block is 12562174, as far as what year it was made, all i can find is 98 and up.

 

after doing some more digging, according the derivative vin# it is indeed made in 98 =(

 

For what you are shooting for I don't see a problem using your block. Bob

 

Thanks for the info. Alum block it is.

 

ls1 Aluminum block can handle easily 800 to 900 RWHP