Hello! My external balanced D9 block is rebuilt and pictured. My internal balanced block from a ‘77 Mk V is also pictured. I am was very much taken back in terms of being impressed with the casting on the D9 block compared to 5.0 (mostly roller cam) SBF I have done. To my horror, the ‘77 block is much thinner and shows porosity in the lifter valley. I am not sure if this ‘77 block is a concern for a future build? This is an area where stressed short deck SBFs fail, and the D9 block is very impressive in this area...
12 KB Views: 53
13.7 KB Views: 61