Yes Pete... If you block the keel too far back in front, damage can occur. We had a new yard guy block one a few years ago, and the front block went right thru the hull...it was placed on a flatter section of the hull. We had this happen this year to a 2002 Maxum 3300SCR, aparently there was a problem in the manufacture of the boat, and they are covering the repair under warranty. As far as time period of design, I believe that 32 Pacemaker came out in the mid 1970's, so that hull design lasted approximatley 20 years. I'm told that the current 350/36 Mariner have a modified version of the 3297/3257 hull, so that extends it even further. However, 2008 may well be the last year for it.