Do you have a Z06 Intake Manifold?
Also, according to GM High Tech Performance Magazine, select few LS1 F-bodies have a LS6 blocks. According to the Block ID# they gave in the Magazine, I have an LS6 Block. Can anyone back this up?
The only real difference between blocks, to my knowledge, is openings in the bulkheads between cylinders. It supposedly relieves crankcase pressure at high RPM.
LS6 block is in a few (10%?) 01s and some (25%) 02s. The LS6 block has "improved bay-to-bay breathing", and has a different casting process & materials to make it stronger. Probably doesn't make a *huge* difference, but I'm sure it doesn't hurt.
I have the LS1 block... :/
good luck,
Shane
LS6 block is in a few (10%?) 01s and some (25%) 02s. The LS6 block has "improved bay-to-bay breathing", and has a different casting process & materials to make it stronger. Probably doesn't make a *huge* difference, but I'm sure it doesn't hurt.
I have the LS1 block... :/
good luck,
Shane
if you look under the car right beside the bar code sticker on the underside of the engine there should be a cast in block number the LS1 is 12561166 on a LS6 its 12561168 


