If you do decide to drill and tap with the oil pan in place, we provide a field-proven procedure on how to best accomplish this in the manual. We're able to manage the chips sufficiently that it's of no concern to the engine. We'll also change out the oil after the procedure, which helps to remove any errant bits. Should any remain, the oil pickup screen will keep all but the tiniest ones away from the oil pump...and as those small particles are made of dead-soft cast aluminum, they pose no hazard to your super-hard steel oil pump rotors, and will pass right through to be arrested at the oil filter.
Mind you, this is not an argument against taking the pan off, for those who'd prefer to go that extra mile. Just letting you know that this alternative method is a tried and true approach.
This is EXACTLY what I needed to hear... Thank you! Me n my friend will be pulling an all nighter this Friday.. He has installed your turbo on his SS... I believe he has the manual, but if u wouldn't mind, could u email me any relevant info at garretttaguchi@gmail.com.. Thanks! Glad to be part of the Hahn club!