As mentioned in another thread, my block was one of 2, personally delivered by Mike T., just after thanksgiving this year (2010). I'm building a 475ci. nitrous motor, my goal is to run in the 8.60 to 8.40 range, or quicker, with my '65 Skylark Convertible. I'm hoping a 54 mm cam core will be available soon so I can get that custom grind in the "works". Big fogger nitrous unit will be ordered by the end of the week, custom CP pistons, rings and pins should soon be done, and I already have a Moldex crank and aluminum rods anxiously waiting.. Gary G.