Don't do it. Slicktops are an extremely rare car that will be worth lots of money someday, as there were tyically only a few hundred made each year, most of them were special order. Why ruin the originality of one with a swap when you can simply buy a TT and eliminate HICAS and have the same weight loss, more less as the difference between slick and t-tops. Then again, people mod and mess with slicktops already, so whatever...but they will kick themselves in 10 years...ask some old school guys about the Chevelles and similar they ruined with what seemed to be the thing to do at the time.