Not sure about where the ball will fit, but as for drilling...
Ebonite does not recommend the label drill uness you have very high revs or very slow ball speed. For a strong arcing ball reaction, they recommend a stacked drill (pin and MB both 3-3/8 from PAP). Have you watched the vids on Ebo's web site? Pretty infomative.
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Jon (in Ohio)
CHROME WON'T GET YOU HOME!
F.O.S. Proud Saw user...see profile.