ls6 block
02-18-2012, 10:45 PM
#1
TECH Apprentice
Thread Starter
ls6 block planning to build a motor for my 01 trans am. i am currently looking at 2 ls6 blocks 12561168 or 12561166. witch one is the better block. are they both the same? witch one is better for my application. thanks.
02-19-2012, 09:05 AM
#3
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They are the same the 66 is an earlier block than the 68.
https://summitracing.custhelp.com/ci/fattach/get/44974/
https://summitracing.custhelp.com/ci/fattach/get/44974/
02-19-2012, 11:53 AM
#5
TECH Apprentice
Thread Starter
i was reading there is a oil port that is enlarged on the back of the block on ls6 blocks is this would this block have this. the bigger hole alows more oil to lifters.
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02-19-2012, 01:00 PM
#9
I would get the newer block,more refined probably.get a ls2 block ,bigger bore for more cubes.would it be cheaper to machine a engine up north there or ship a short block already machined ?