No, no, no...what I said was "problem is when you strip the threads in the cowl, it's shot".....if you drill out the Phillips screws, there are a couple that screw into little 'tangs' on the steering column & if you drill out their threads, you're screwed big time.....so, don't drill out the screws.
Doc & I have both thought out loud about completely cleaning out all the holes until you feel the screws...I'd do it with a pick to see if it hits a screw head....&, if it never finds a screw, then the next step is to see if the PO glued both sides together.....still, it needs screws to hold it in place.
Oh, remove your steering wheel before you go any farther....that does 2 things: it removes the lip of the wheel behind which the cowl is positioned & it lets you look down into the cowl to see how its held in place.