This will be my last post on this. Here is where Ill ask the who's who of this BOARD as well as any others in the know: Sleeve size : does the 4.250 sleeve have a different OD than any larger displacement sleeve to be used here, 4.440 or 4.500 & larger? I am guessing now, but if a larger sleeve is installed, would the aluminum core have to be machined to accept that larger OD if this is the case?

[the last time I saw this engine setup at Pomona, it was assembled as such in your attatchment above. I never saw the sleeves being different with the heads bolted on.]