Can one of you guys that knows how to do the math get the measurments and figure that out?
I don't have numbers for the 11.25:1 JE slug since it's pretty new and it won't do any good to throw numbers around without knowing what piston you want to get.
The thing with going high compression first is that your engine is going to be more octane sensitive until you at least get a cam. I don't know how high the compression can go on pump gas with aftermarket cams, but I do know that around 9.8:1 is where the stock cam draws a line in the sand. A "10.5:1" piston will produce about that much static compression. An 11.25:1, I don't know.