ls6 block

Reply Subscribe

Thread Tools

Search this Thread

Feb 18, 2012 | 10:45 PM

spiro27

Thread Starter

TECH Apprentice

Joined: Dec 2010

Posts: 325

Likes: 1

From: canada

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.

Feb 18, 2012 | 10:48 PM

spiro27

Thread Starter

TECH Apprentice

Joined: Dec 2010

Posts: 325

Likes: 1

From: canada

and what is a fair price for one?

Feb 19, 2012 | 09:05 AM

GNIUS

Staging Lane

iTrader: (2)

Joined: Aug 2011

Posts: 84

Likes: 0

From: Cincinnati, OH

They are the same the 66 is an earlier block than the 68.

https://summitracing.custhelp.com/ci/fattach/get/44974/

Feb 19, 2012 | 10:32 AM

bww3588

12 Second Club

iTrader: (49)

Joined: Sep 2005

Posts: 8,139

Likes: 10

From: Chillicothe/Lima, Ohio

Either way, a 3.898 bore block is a 3.898 bore block. You will have no significant gains using a one block over the other...from a 98 ls1 block to an 04 ls6 block. They are all nearly identical with minor differences.

Feb 19, 2012 | 11:53 AM

spiro27

Thread Starter

TECH Apprentice

Joined: Dec 2010

Posts: 325

Likes: 1

From: canada

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.