Super B top HP?

why is it so hard to get specs? How do dealers sell these things without them?
 
I made 450hp with a super b with II 10holes. then swapped in a silver 64 and made 569hp with the same setup and a new map sensor. Then made 590hp with II 11holes with the silver 64. I wouldnt use anything but the II silver 64 ever again. Other than i might go up to a 66 in the future.
 
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