what the hell is a sure grip

Its true though... most dealers wont go back that far as the inventory control doesnt allow for our older stuff. I am pretty sure in our million dollar inventory you wont find one item for anything older then say maybe 1995. Money management and items that actually turn are what the parts managers should be looking at. Now a good parts counter guy should automatically pull out the Mopar performance catalog and happily look up what you need.
actually, a good parts counter guy (especially at a Chrysler dealership) should be able to get you a set of SBM valve cover gaskets without opening a book...