Ok so i built an engine for a clients rock bouncer build, he died in an accident before the build was finished. I parted out the build for the widow so she'd recoup as much money as possible and I bought the motor to use for a project i was thinking about starting. Well the engine sat on an old engine stand for a couple years until it broke and the motor hit the floor and cracked the block so now my dilemma is to go with another 6.0 block or get a 6.2 block. Money isn't a problem. The motor will go in my 68 camaro and probably end up being twin turbo which I'm leaning heavily towards. Rotating assembly is 4" lunati forged stroker crank and rods with mahle forged pistons. TEA 317 stage 3 heads, tooley valve train, custom cam whose specs i can't find at the moment. Currently no intake.


So what block would y'all do?

Iron for the boost.

Can you post pics of the damage please?

I already got rid of the block

You can't use 6.0 pistons in a 6.2 block, which means new pistons and a rebalancing job. I'd just get another 6.0 liter block.

Isn't this the General LSX Automobile Discussion? I would think this was for those with LSX engine related questions.

OP: " probably end up being twin turbo which I'm leaning heavily" That's ALL you had to SAY. The answer is IRON.

The majority of the quickest/fastest factory blocks have been aluminum. The current quickest stock block is aluminum, as was the one before.

I agree with the above statement. 6.0 blocks are known to crack radially around the bores when pushed hard - the cylinder walls aren't thick enough. The siamese bore aluminum 5.3 blocks are the strongest factory blocks GM made for the LS platform. That's if they aren't fully bored out to LS1 size to keep the liners thick. I didn't suggest one because the OP seemed to want to stay with a larger displacement.

The LSX block has many advantages over a factory LS block, sleeved or not. Capable of larger displacement in turbo application, it's a block that actually utilizes 6 bolt cylinder heads for better clamping in forced induction applications and it has priority main oiling system just to name a few.