Lineslinger Mark I would go with the 8 sleeves. As long as the machining is done correct. Thin wall sleeves work great and you can not see them when done. Old Red has beat that red car for he last 8 years at the Run&Gun. The car as not broken once. He does 10-15 runs for the bracket racing, This motor just keeps running, on the other hand I have also seen some of the otherengine builders motor generade all over the place. George's car get 3 days of hard running. Pete Tork who runs that other line of motor also never breaks
I could have won last year bracket Pete.
I run a motor with 8 sleeves now. The shelby motor has them. Any other questions?
Rick Lake