If you’re dead set on a 6.2 then just stick with a gen 3 6.0 and punch it out to 4.065. 6.2 blocks are gen 4 and will require lots of integration since they require gen 4 sensor placement (knock sensors, AFM oil towers, cam sensor, etc). If it’s a gen 5, then you’re in for a shit ton more work.
Or just get another 6.0, leave it alone and drop it in and call it a day. In my opinion dropping in a 6.2 isn’t worth the effort unless you’re into it for a pet project and love throwing money at it.
If your heads are cracked there's a very good chance your block is Warped. You might get lucky and I might not be. Then again it could just be a simple thermostat failure. They don't make them like they used to
I did see gm had a service bulletin on the castech heads while doing some research last night i dont happen to remember the markings inside the head from when i just had it apart ia there a way to tell from the outside?
Pretty much, and that’s likely what you have. Let’s take a step back first. What is making you think you have a cracked head or block? Other than visual confirmation, that will be kinda hard to tell. Is it overheating or what?
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