Try putting a socket behind the hole and then hammer it. A socket will also fit better between the raised ridges between the bolt holes, and if you use a ball peen hammer it will cause the bolt holes to push out ever so slightly away from the engine side. As for sealing the gasket, I've tried everything and have had extraordinary luck with that red, spray gasket adhesive. Load it up on both sides to color the cork gasket red, then let it set up for a bit. ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.