I'm thinking if you drilled a hole down alongside the threads for the oil to get past the bolt threads but 1st not being familiar w W2's that is a pedestal just like LA's (it's shallow in the pic & hard to tell) & the only diff (as far as valvetrain is the offset rockers right? or are the stands offset also?). What I'm missing is what bolt do the stock w2's use that lets the oil flow past it? EDIT just saw your latest pics. I'd drill the notch in the W2's & unless I am missing something I think that'd b a simple fix. You'd lose a little bit of thread engagement but that wont hurt you. W care you could temporarily plug below your drilling to keep shavings out.