I agree, but there's so much hard block in there the cylinder is supported good IMO. 2 sleeves 1 and 8 would of been the best solution thou. I do have a better back up block now just in case. I'm very happy with this oil cooler thou. Can't believe how well the oil maintains its viscosity now. 30# of oil pressure at idle in drive now with 200* hot oil vs 15# with 250*+ hot oil.