i'm using an ls2 block on my turbo build in my ls1 car and i'v heard there are parts that are not the same, what is different????

 

im sure you know this but the ls2 block itself is a 6.0L if that helps lol

 

These are the main differences between the two (short) blocks:

LS1 (CID = 346, 5.7L)
3.89" bore
Knock Sensors in lifter valley
Cam sensor located at the top, back of the block, next to the oil pressure sender

LS2 (CID = 364, 6.0L)
4.00" bore
Knock Sensor located on either side of the block, externally between 3-5 and 4-6
Cam sensor is located on the front cover