I looked in the '65 interior assembly manual by Osborn, page 45, and it shows 13 screws (380025-8) for the well liner (described as "trim assembly- folding top compartment rear") for securing each side and the back portion of the liner. For the front part of the liner directly behind the seat, it calls out 5 screws (377948-S2) for securing this section. Spacing of the screws is not described. Since there is no mention of a need to drill holes, I'm guessing existing holes corresponding to the number of screws listed would already exist.