Sorry to keep harrassing the board with my wiper issues. Being a former drag car, my 65 Belvedere has no holes in the cowl for the pivots; I'm not sure if it's been filled and smoothed or is a replacement. Will the pivot holes need to be recessed, in which case I guess I'd need to replace the whole cowl? Or will I be able to drill a hole for them through the flat one? - Jim