I see a few for sale on R-Junk. Has anyone utilised a Stage 10 Keith Black Hemi block? In a bracket car or NSS type application. These ones appear to be a 4.187 bore version,sleeves apparently max out at 4.310. Can the sleeves be purchased to go up to 4.50 with K.B not manufacturing them anymore? today everything seems to be 4.50. What would the max engine size be with the 4.187 sleeves? Engine bore and stroke combo's? Any info appreciated.