Sleeves = 4K boat achor
Even if they are installed correctly they are going to move. Mine went out of round after 50 passes and 1500 street miles. Different motor (LS1) but still an aluminum block.
I cut a cylinder head in half to see how much material was between the water jackets and the ports. There is only about .080 of material that can be removed without weaken the integrity of the head. Not much material above each combustion chamber, definitely the weakest spot. Can only imagine what it looks like at 25psi.
Should have my block back in 6 weeks. I'm having additional supports machined in above each combustion chamber. I'll post some pics when I pick it up.
That's my contribution to the R+D instead of GoFundMe donations...lol
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